31320121432 has 8 divisors (see below), whose sum is σ = 58725227700. Its totient is φ = 15660060712.

The previous prime is 31320121369. The next prime is 31320121457. The reversal of 31320121432 is 23412102313.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957507582 + ... + 1957507597.

Almost surely, 2^31320121432 is an apocalyptic number.

It is an amenable number.

31320121432 is a deficient number, since it is larger than the sum of its proper divisors (27405106268).

31320121432 is a wasteful number, since it uses less digits than its factorization.

31320121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915015185 (or 3915015181 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31320121432 its reverse (23412102313), we get a palindrome (54732223745).

The spelling of 31320121432 in words is "thirty-one billion, three hundred twenty million, one hundred twenty-one thousand, four hundred thirty-two".