31202131213 has 8 divisors (see below), whose sum is σ = 34320001536. Its totient is φ = 28365572620.

The previous prime is 31202131193. The next prime is 31202131229. The reversal of 31202131213 is 31213120213.

It is not a de Polignac number, because 31202131213 - 2¹³ = 31202123021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202131243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11719981 + ... + 11722642.

It is an arithmetic number, because the mean of its divisors is an integer number (4290000192).

Almost surely, 2^31202131213 is an apocalyptic number.

It is an amenable number.

31202131213 is a deficient number, since it is larger than the sum of its proper divisors (3117870323).

31202131213 is an equidigital number, since it uses as much as digits as its factorization.

31202131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23442656 (or 23442634 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31202131213 its reverse (31213120213), we get a palindrome (62415251426).

The spelling of 31202131213 in words is "thirty-one billion, two hundred two million, one hundred thirty-one thousand, two hundred thirteen".