31331001121232 has 20 divisors (see below), whose sum is σ = 62797049662020. Its totient is φ = 15125310885888.

The previous prime is 31331001121183. The next prime is 31331001121289. The reversal of 31331001121232 is 23212110013313.

It can be written as a sum of positive squares in 2 ways, for example, as 12665456028736 + 18665545092496 = 3558856^2 + 4320364^2 .

It is a super-2 number, since 2×31331001121232² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31331001121198 and 31331001121207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33761854193 + ... + 33761855120.

It is an arithmetic number, because the mean of its divisors is an integer number (3139852483101).

Almost surely, 2^{31331001121232} is an apocalyptic number.

It is an amenable number.

31331001121232 is an abundant number, since it is smaller than the sum of its proper divisors (31466048540788).

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

31331001121232 is a wasteful number, since it uses less digits than its factorization.

31331001121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67523709350 (or 67523709344 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31331001121232 its reverse (23212110013313), we get a palindrome (54543111134545).

The spelling of 31331001121232 in words is "thirty-one trillion, three hundred thirty-one billion, one million, one hundred twenty-one thousand, two hundred thirty-two".