31100113123031 has 16 divisors (see below), whose sum is σ = 31934074798080. Its totient is φ = 30275569977120.

The previous prime is 31100113122817. The next prime is 31100113123039. The reversal of 31100113123031 is 13032131100113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100113123031 is a prime.

It is a super-2 number, since 2×31100113123031² (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 = 31100113122994 and 31100113123012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100113123039) 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, 10982066 + ... + 13520576.

It is an arithmetic number, because the mean of its divisors is an integer number (1995879674880).

Almost surely, 2^{31100113123031} is an apocalyptic number.

31100113123031 is a deficient number, since it is larger than the sum of its proper divisors (833961675049).

31100113123031 is a wasteful number, since it uses less digits than its factorization.

31100113123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540366.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31100113123031 its reverse (13032131100113), we get a palindrome (44132244223144).

The spelling of 31100113123031 in words is "thirty-one trillion, one hundred billion, one hundred thirteen million, one hundred twenty-three thousand, thirty-one".