31100012012131 has 4 divisors (see below), whose sum is σ = 31100380986472. Its totient is φ = 31099643037792.

The previous prime is 31100012012093. The next prime is 31100012012137. The reversal of 31100012012131 is 13121021000113.

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 31100012012131 - 2¹⁵ = 31100011979363 is a prime.

It is a super-2 number, since 2×31100012012131² (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 (31100012012137) 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, 184360710 + ... + 184529323.

It is an arithmetic number, because the mean of its divisors is an integer number (7775095246618).

Almost surely, 2^{31100012012131} is an apocalyptic number.

31100012012131 is a deficient number, since it is larger than the sum of its proper divisors (368974341).

31100012012131 is an equidigital number, since it uses as much as digits as its factorization.

31100012012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368974340.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31100012012131 its reverse (13121021000113), we get a palindrome (44221033012244).

The spelling of 31100012012131 in words is "thirty-one trillion, one hundred billion, twelve million, twelve thousand, one hundred thirty-one".