31330232565121 has 48 divisors (see below), whose sum is σ = 37848015175680. Its totient is φ = 25831628676000.

The previous prime is 31330232565113. The next prime is 31330232565139. The reversal of 31330232565121 is 12156523203313.

It is not a de Polignac number, because 31330232565121 - 2³ = 31330232565113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31330232565101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 371032776 + ... + 371117206.

It is an arithmetic number, because the mean of its divisors is an integer number (788500316160).

Almost surely, 2^{31330232565121} is an apocalyptic number.

31330232565121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31330232565121 is a deficient number, since it is larger than the sum of its proper divisors (6517782610559).

31330232565121 is a wasteful number, since it uses less digits than its factorization.

31330232565121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85946 (or 85939 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 31330232565121 its reverse (12156523203313), we get a palindrome (43486755768434).

The spelling of 31330232565121 in words is "thirty-one trillion, three hundred thirty billion, two hundred thirty-two million, five hundred sixty-five thousand, one hundred twenty-one".