31130020102332 has 72 divisors (see below), whose sum is σ = 75950957048400. Its totient is φ = 9923054113280.

The previous prime is 31130020102289. The next prime is 31130020102399. The reversal of 31130020102332 is 23320102003113.

It is a junction number, because it is equal to n+sod(n) for n = 31130020102299 and 31130020102308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25097482 + ... + 26308622.

It is an arithmetic number, because the mean of its divisors is an integer number (1054874403450).

Almost surely, 2^{31130020102332} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31130020102332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37975478524200).

31130020102332 is an abundant number, since it is smaller than the sum of its proper divisors (44820936946068).

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

31130020102332 is a wasteful number, since it uses less digits than its factorization.

31130020102332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215243 (or 1215218 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31130020102332 its reverse (23320102003113), we get a palindrome (54450122105445).

The spelling of 31130020102332 in words is "thirty-one trillion, one hundred thirty billion, twenty million, one hundred two thousand, three hundred thirty-two".