31020324132131 has 4 divisors (see below), whose sum is σ = 31020705518712. Its totient is φ = 31019942745552.

The previous prime is 31020324132121. The next prime is 31020324132143. The reversal of 31020324132131 is 13123142302013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31020324132131 - 2⁶ = 31020324132067 is a prime.

It is a super-2 number, since 2×31020324132131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020324132131.

It is not an unprimeable number, because it can be changed into a prime (31020324132121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190571261 + ... + 190733966.

It is an arithmetic number, because the mean of its divisors is an integer number (7755176379678).

Almost surely, 2^{31020324132131} is an apocalyptic number.

31020324132131 is a deficient number, since it is larger than the sum of its proper divisors (381386581).

31020324132131 is an equidigital number, since it uses as much as digits as its factorization.

31020324132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381386580.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31020324132131 its reverse (13123142302013), we get a palindrome (44143466434144).

The spelling of 31020324132131 in words is "thirty-one trillion, twenty billion, three hundred twenty-four million, one hundred thirty-two thousand, one hundred thirty-one".