31111011201013 has 4 divisors (see below), whose sum is σ = 31111445135680. Its totient is φ = 31110577266348.

The previous prime is 31111011200977. The next prime is 31111011201043. The reversal of 31111011201013 is 31010211011113.

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 31111011201013 - 2²¹ = 31111009103861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111011201043) 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, 216859773 + ... + 217003186.

It is an arithmetic number, because the mean of its divisors is an integer number (7777861283920).

Almost surely, 2^{31111011201013} is an apocalyptic number.

It is an amenable number.

31111011201013 is a deficient number, since it is larger than the sum of its proper divisors (433934667).

31111011201013 is an equidigital number, since it uses as much as digits as its factorization.

31111011201013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433934666.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 31111011201013 its reverse (31010211011113), we get a palindrome (62121222212126).

The spelling of 31111011201013 in words is "thirty-one trillion, one hundred eleven billion, eleven million, two hundred one thousand, thirteen".