31310002112131 has 4 divisors (see below), whose sum is σ = 31364265547912. Its totient is φ = 31255738676352.

The previous prime is 31310002112101. The next prime is 31310002112177. The reversal of 31310002112131 is 13121120001313.

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 31310002112131 - 2⁷ = 31310002112003 is a prime.

It is a super-2 number, since 2×31310002112131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310002112099 and 31310002112108.

It is not an unprimeable number, because it can be changed into a prime (31310002112101) 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, 27131717025 + ... + 27131718178.

It is an arithmetic number, because the mean of its divisors is an integer number (7841066386978).

Almost surely, 2^{31310002112131} is an apocalyptic number.

31310002112131 is a deficient number, since it is larger than the sum of its proper divisors (54263435781).

31310002112131 is an equidigital number, since it uses as much as digits as its factorization.

31310002112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54263435780.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31310002112131 its reverse (13121120001313), we get a palindrome (44431122113444).

The spelling of 31310002112131 in words is "thirty-one trillion, three hundred ten billion, two million, one hundred twelve thousand, one hundred thirty-one".