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1211111122120 = 23530277778053
BaseRepresentation
bin10001100111111011110…
…110010010010011001000
311021210002102020121002221
4101213323312102103020
5124320323421401440
62324213214303424
7153333314453044
oct21477366222310
94253072217087
101211111122120
114276a1722649
1217687a7b7b74
138a29054b393
1442892083024
15217853c9d4a
hex119fbd924c8

1211111122120 has 16 divisors (see below), whose sum is σ = 2725000024860. Its totient is φ = 484444448832.

The previous prime is 1211111122079. The next prime is 1211111122171. The reversal of 1211111122120 is 212211111121.

It can be written as a sum of positive squares in 2 ways, for example, as 1164417962724 + 46693159396 = 1079082^2 + 216086^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211111122094 and 1211111122103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15138888987 + ... + 15138889066.

Almost surely, 21211111122120 is an apocalyptic number.

1211111122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211111122120 is an abundant number, since it is smaller than the sum of its proper divisors (1513888902740).

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

1211111122120 is a wasteful number, since it uses less digits than its factorization.

1211111122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30277778064 (or 30277778060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1211111122120 its reverse (212211111121), we get a palindrome (1423322233241).

The spelling of 1211111122120 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 30277778053 60555556106 121111112212 151388890265 242222224424 302777780530 605555561060 1211111122120