121235664 has 40 divisors (see below), whose sum is σ = 341665632. Its totient is φ = 36737920.

The previous prime is 121235633. The next prime is 121235669. The reversal of 121235664 is 466532121.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121235669) 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, 114279 + ... + 115334.

Almost surely, 2^121235664 is an apocalyptic number.

It is an amenable number.

121235664 is an abundant number, since it is smaller than the sum of its proper divisors (220429968).

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

121235664 is a wasteful number, since it uses less digits than its factorization.

121235664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229635 (or 229629 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 121235664 is about 11010.7067893029. The cubic root of 121235664 is about 494.9296420763.

Adding to 121235664 its reverse (466532121), we get a palindrome (587767785).

The spelling of 121235664 in words is "one hundred twenty-one million, two hundred thirty-five thousand, six hundred sixty-four".