121215632 has 40 divisors (see below), whose sum is σ = 241056000. Its totient is φ = 59021312.

The previous prime is 121215631. The next prime is 121215637. The reversal of 121215632 is 236512121.

It is a junction number, because it is equal to n+sod(n) for n = 121215598 and 121215607.

It is not an unprimeable number, because it can be changed into a prime (121215631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 269744 + ... + 270192.

It is an arithmetic number, because the mean of its divisors is an integer number (6026400).

Almost surely, 2^121215632 is an apocalyptic number.

It is an amenable number.

121215632 is a deficient number, since it is larger than the sum of its proper divisors (119840368).

121215632 is a wasteful number, since it uses less digits than its factorization.

121215632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 857 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 121215632 is about 11009.7970916816. The cubic root of 121215632 is about 494.9023811852.

Adding to 121215632 its reverse (236512121), we get a palindrome (357727753).

The spelling of 121215632 in words is "one hundred twenty-one million, two hundred fifteen thousand, six hundred thirty-two".