112121999956 has 24 divisors (see below), whose sum is σ = 198233620200. Its totient is φ = 55486502400.

The previous prime is 112121999923. The next prime is 112121999959. The reversal of 112121999956 is 659999121211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71132356 + 112050867600 = 8434^2 + 334740^2 .

It is a junction number, because it is equal to n+sod(n) for n = 112121999897 and 112121999906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121999959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167265 + ... + 502216.

It is an arithmetic number, because the mean of its divisors is an integer number (8259734175).

Almost surely, 2^112121999956 is an apocalyptic number.

It is an amenable number.

112121999956 is a deficient number, since it is larger than the sum of its proper divisors (86111620244).

112121999956 is a wasteful number, since it uses less digits than its factorization.

112121999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669915 (or 669913 counting only the distinct ones).

The product of its digits is 787320, while the sum is 55.

The spelling of 112121999956 in words is "one hundred twelve billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred fifty-six".