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1121201212212 = 2232199731559329
BaseRepresentation
bin10000010100001100110…
…011001100101100110100
310222012000102212221100200
4100110030303030230310
5121332210002242322
62215023413040500
7144001261025604
oct20241463145464
93865012787320
101121201212212
113a2553944584
12161368026130
13819622b0063
143c3a3116c04
151e271de68ac
hex1050ccccb34

1121201212212 has 36 divisors (see below), whose sum is σ = 2834291225220. Its totient is φ = 373714785792.

The previous prime is 1121201212091. The next prime is 1121201212237. The reversal of 1121201212212 is 2122121021211.

It can be written as a sum of positive squares in 2 ways, for example, as 323745068196 + 797456144016 = 568986^2 + 893004^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60637 + ... + 1498692.

Almost surely, 21121201212212 is an apocalyptic number.

1121201212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121201212212 is an abundant number, since it is smaller than the sum of its proper divisors (1713090013008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121201212212 is a wasteful number, since it uses less digits than its factorization.

1121201212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579312 (or 1579307 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121201212212 its reverse (2122121021211), we get a palindrome (3243322233423).

The spelling of 1121201212212 in words is "one trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, two hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 19973 39946 59919 79892 119838 179757 239676 359514 719028 1559329 3118658 4677987 6237316 9355974 14033961 18711948 28067922 56135844 31144478117 62288956234 93433434351 124577912468 186866868702 280300303053 373733737404 560600606106 1121201212212