31313000021011 has 4 divisors (see below), whose sum is σ = 31313038741000. Its totient is φ = 31312961301024.

The previous prime is 31313000020997. The next prime is 31313000021021. The reversal of 31313000021011 is 11012000031313.

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 31313000021011 - 2⁹ = 31313000020499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313000021021) 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, 18120486 + ... + 19773163.

It is an arithmetic number, because the mean of its divisors is an integer number (7828259685250).

Almost surely, 2^{31313000021011} is an apocalyptic number.

31313000021011 is a deficient number, since it is larger than the sum of its proper divisors (38719989).

31313000021011 is an equidigital number, since it uses as much as digits as its factorization.

31313000021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38719988.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31313000021011 its reverse (11012000031313), we get a palindrome (42325000052324).

The spelling of 31313000021011 in words is "thirty-one trillion, three hundred thirteen billion, twenty-one thousand, eleven".