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2111311212 = 2231274313807
BaseRepresentation
bin111110111011000…
…0000110101101100
312110010210201111120
41331312000311230
513310443424322
6545300420540
7103214564163
oct17566006554
95403721446
102111311212
119938643aa
124ab0a7750
1327854b49a
141605923da
15c554da5c
hex7dd80d6c

2111311212 has 24 divisors (see below), whose sum is σ = 4927136256. Its totient is φ = 703664208.

The previous prime is 2111311177. The next prime is 2111311219. The reversal of 2111311212 is 2121131112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2111311191 and 2111311200.

It is not an unprimeable number, because it can be changed into a prime (2111311219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 146013 + ... + 159819.

It is an arithmetic number, because the mean of its divisors is an integer number (205297344).

Almost surely, 22111311212 is an apocalyptic number.

It is an amenable number.

2111311212 is an abundant number, since it is smaller than the sum of its proper divisors (2815825044).

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

2111311212 is a wasteful number, since it uses less digits than its factorization.

2111311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26557 (or 26555 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 2111311212 is about 45949.0066486752. The cubic root of 2111311212 is about 1282.8742401186.

Adding to 2111311212 its reverse (2121131112), we get a palindrome (4232442324).

The spelling of 2111311212 in words is "two billion, one hundred eleven million, three hundred eleven thousand, two hundred twelve".

Divisors: 1 2 3 4 6 12 12743 13807 25486 27614 38229 41421 50972 55228 76458 82842 152916 165684 175942601 351885202 527827803 703770404 1055655606 2111311212