121856112 has 60 divisors (see below), whose sum is σ = 389749360. Its totient is φ = 34815744.

The previous prime is 121856099. The next prime is 121856113. The reversal of 121856112 is 211658121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121856113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59437 + ... + 61452.

Almost surely, 2^121856112 is an apocalyptic number.

121856112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121856112 is an abundant number, since it is smaller than the sum of its proper divisors (267893248).

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

121856112 is a wasteful number, since it uses less digits than its factorization.

121856112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120910 (or 120901 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 121856112 is about 11038.8455918180. The cubic root of 121856112 is about 495.7725066703.

The spelling of 121856112 in words is "one hundred twenty-one million, eight hundred fifty-six thousand, one hundred twelve".