31123311210113 has 4 divisors (see below), whose sum is σ = 31126875909168. Its totient is φ = 31119746511060.

The previous prime is 31123311210053. The next prime is 31123311210151. The reversal of 31123311210113 is 31101211332113.

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 31123311210113 - 2²⁶ = 31123244101249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123311210713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782336431 + ... + 1782353892.

It is an arithmetic number, because the mean of its divisors is an integer number (7781718977292).

Almost surely, 2^{31123311210113} is an apocalyptic number.

It is an amenable number.

31123311210113 is a deficient number, since it is larger than the sum of its proper divisors (3564699055).

31123311210113 is an equidigital number, since it uses as much as digits as its factorization.

31123311210113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564699054.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31123311210113 its reverse (31101211332113), we get a palindrome (62224522542226).

The spelling of 31123311210113 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred eleven million, two hundred ten thousand, one hundred thirteen".