121312912 has 20 divisors (see below), whose sum is σ = 268621696. Its totient is φ = 51991200.

The previous prime is 121312907. The next prime is 121312927. The reversal of 121312912 is 219213121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541464 + ... + 541687.

Almost surely, 2^121312912 is an apocalyptic number.

It is an amenable number.

121312912 is an abundant number, since it is smaller than the sum of its proper divisors (147308784).

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

121312912 is a wasteful number, since it uses less digits than its factorization.

121312912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083166 (or 1083160 counting only the distinct ones).

The product of its digits is 216, while the sum is 22.

The square root of 121312912 is about 11014.2140890760. The cubic root of 121312912 is about 495.0347382348.

The spelling of 121312912 in words is "one hundred twenty-one million, three hundred twelve thousand, nine hundred twelve".