31203311130113 has 4 divisors (see below), whose sum is σ = 31203368279808. Its totient is φ = 31203253980420.

The previous prime is 31203311130073. The next prime is 31203311130127. The reversal of 31203311130113 is 31103111330213.

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 31203311130113 - 2⁶ = 31203311130049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203311130713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27747881 + ... + 28850502.

It is an arithmetic number, because the mean of its divisors is an integer number (7800842069952).

Almost surely, 2^{31203311130113} is an apocalyptic number.

It is an amenable number.

31203311130113 is a deficient number, since it is larger than the sum of its proper divisors (57149695).

31203311130113 is an equidigital number, since it uses as much as digits as its factorization.

31203311130113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57149694.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31203311130113 its reverse (31103111330213), we get a palindrome (62306422460326).

The spelling of 31203311130113 in words is "thirty-one trillion, two hundred three billion, three hundred eleven million, one hundred thirty thousand, one hundred thirteen".