31201023313131 has 12 divisors (see below), whose sum is σ = 48393423914472. Its totient is φ = 17829156178848.

The previous prime is 31201023313123. The next prime is 31201023313139. The reversal of 31201023313131 is 13131332010213.

It is an interprime number because it is at equal distance from previous prime (31201023313123) and next prime (31201023313139).

It is not a de Polignac number, because 31201023313131 - 2³ = 31201023313123 is a prime.

It is a super-2 number, since 2×31201023313131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31201023313139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106125929490 + ... + 106125929783.

It is an arithmetic number, because the mean of its divisors is an integer number (4032785326206).

Almost surely, 2^{31201023313131} is an apocalyptic number.

31201023313131 is a deficient number, since it is larger than the sum of its proper divisors (17192400601341).

31201023313131 is a wasteful number, since it uses less digits than its factorization.

31201023313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212251859290 (or 212251859283 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31201023313131 its reverse (13131332010213), we get a palindrome (44332355323344).

The spelling of 31201023313131 in words is "thirty-one trillion, two hundred one billion, twenty-three million, three hundred thirteen thousand, one hundred thirty-one".