121520232 has 24 divisors (see below), whose sum is σ = 329117490. Its totient is φ = 40506720.

The previous prime is 121520227. The next prime is 121520251. The reversal of 121520232 is 232025121.

121520232 is a `hidden beast` number, since 121 + 520 + 23 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 112911876 + 8608356 = 10626^2 + 2934^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 843819 + ... + 843962.

Almost surely, 2^121520232 is an apocalyptic number.

121520232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121520232 is an abundant number, since it is smaller than the sum of its proper divisors (207597258).

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

121520232 is a wasteful number, since it uses less digits than its factorization.

121520232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687793 (or 1687786 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 121520232 is about 11023.6215464792. The cubic root of 121520232 is about 495.3165774101.

Adding to 121520232 its reverse (232025121), we get a palindrome (353545353).

The spelling of 121520232 in words is "one hundred twenty-one million, five hundred twenty thousand, two hundred thirty-two".