121996864 has 28 divisors (see below), whose sum is σ = 264097008. Its totient is φ = 55452800.

The previous prime is 121996859. The next prime is 121996867. The reversal of 121996864 is 468699121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121996867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85942 + ... + 87349.

It is an arithmetic number, because the mean of its divisors is an integer number (9432036).

Almost surely, 2^121996864 is an apocalyptic number.

It is an amenable number.

121996864 is an abundant number, since it is smaller than the sum of its proper divisors (142100144).

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

121996864 is a wasteful number, since it uses less digits than its factorization.

121996864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173314 (or 173304 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 121996864 is about 11045.2190562252. The cubic root of 121996864 is about 495.9633167459.

The spelling of 121996864 in words is "one hundred twenty-one million, nine hundred ninety-six thousand, eight hundred sixty-four".