31202020131311 has 16 divisors (see below), whose sum is σ = 31471363123200. Its totient is φ = 30933159254400.

The previous prime is 31202020131277. The next prime is 31202020131313. The reversal of 31202020131311 is 11313102020213.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31202020131311 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 (31202020131313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002587831 + ... + 1002618951.

It is an arithmetic number, because the mean of its divisors is an integer number (1966960195200).

Almost surely, 2^{31202020131311} is an apocalyptic number.

31202020131311 is a deficient number, since it is larger than the sum of its proper divisors (269342991889).

31202020131311 is a wasteful number, since it uses less digits than its factorization.

31202020131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38590.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31202020131311 its reverse (11313102020213), we get a palindrome (42515122151524).

The spelling of 31202020131311 in words is "thirty-one trillion, two hundred two billion, twenty million, one hundred thirty-one thousand, three hundred eleven".