121312032 has 24 divisors (see below), whose sum is σ = 318444336. Its totient is φ = 40437312.

The previous prime is 121312013. The next prime is 121312039. The reversal of 121312032 is 230213121.

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

It is not an unprimeable number, because it can be changed into a prime (121312039) 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, 631738 + ... + 631929.

It is an arithmetic number, because the mean of its divisors is an integer number (13268514).

Almost surely, 2^121312032 is an apocalyptic number.

121312032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121312032 is an abundant number, since it is smaller than the sum of its proper divisors (197132304).

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

121312032 is a wasteful number, since it uses less digits than its factorization.

121312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263680 (or 1263672 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121312032 is about 11014.1741406244. The cubic root of 121312032 is about 495.0335412432.

Adding to 121312032 its reverse (230213121), we get a palindrome (351525153).

The spelling of 121312032 in words is "one hundred twenty-one million, three hundred twelve thousand, thirty-two".