31231122102113 has 4 divisors (see below), whose sum is σ = 31296322775040. Its totient is φ = 31165921429188.

The previous prime is 31231122102109. The next prime is 31231122102151. The reversal of 31231122102113 is 31120122113213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31231122102113 - 2² = 31231122102109 is a prime.

It is a super-2 number, since 2×31231122102113² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231122102613) 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, 32600335745 + ... + 32600336702.

It is an arithmetic number, because the mean of its divisors is an integer number (7824080693760).

Almost surely, 2^{31231122102113} is an apocalyptic number.

It is an amenable number.

31231122102113 is a deficient number, since it is larger than the sum of its proper divisors (65200672927).

31231122102113 is an equidigital number, since it uses as much as digits as its factorization.

31231122102113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65200672926.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31231122102113 its reverse (31120122113213), we get a palindrome (62351244215326).

It can be divided in two parts, 3123112 and 2102113, that added together give a palindrome (5225225).

The spelling of 31231122102113 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-two million, one hundred two thousand, one hundred thirteen".