313231122011 has 4 divisors (see below), whose sum is σ = 313234404000. Its totient is φ = 313227840024.

The previous prime is 313231121999. The next prime is 313231122041. The reversal of 313231122011 is 110221132313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110221132313 = 19 ⋅5801112227.

It is a cyclic number.

It is not a de Polignac number, because 313231122011 - 2¹⁸ = 313230859867 is a prime.

It is a super-2 number, since 2×313231122011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313231122041) 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, 1493411 + ... + 1690188.

It is an arithmetic number, because the mean of its divisors is an integer number (78308601000).

Almost surely, 2^313231122011 is an apocalyptic number.

313231122011 is a deficient number, since it is larger than the sum of its proper divisors (3281989).

313231122011 is an equidigital number, since it uses as much as digits as its factorization.

313231122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281988.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 313231122011 its reverse (110221132313), we get a palindrome (423452254324).

The spelling of 313231122011 in words is "three hundred thirteen billion, two hundred thirty-one million, one hundred twenty-two thousand, eleven".