31313313011 has 4 divisors (see below), whose sum is σ = 31374832800. Its totient is φ = 31251793224.

The previous prime is 31313313007. The next prime is 31313313049. The reversal of 31313313011 is 11031331313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11031331313 = 113 ⋅97622401.

It is a cyclic number.

It is not a de Polignac number, because 31313313011 - 2² = 31313313007 is a prime.

It is a super-2 number, since 2×31313313011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313316011) 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, 30759131 + ... + 30760148.

It is an arithmetic number, because the mean of its divisors is an integer number (7843708200).

Almost surely, 2^31313313011 is an apocalyptic number.

31313313011 is a deficient number, since it is larger than the sum of its proper divisors (61519789).

31313313011 is an equidigital number, since it uses as much as digits as its factorization.

31313313011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61519788.

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 31313313011 its reverse (11031331313), we get a palindrome (42344644324).

The spelling of 31313313011 in words is "thirty-one billion, three hundred thirteen million, three hundred thirteen thousand, eleven".