313231401021 has 16 divisors (see below), whose sum is σ = 520696355328. Its totient is φ = 162717610800.

The previous prime is 313231401001. The next prime is 313231401083. The reversal of 313231401021 is 120104132313.

It is not a de Polignac number, because 313231401021 - 2¹⁰ = 313231399997 is a prime.

It is a super-2 number, since 2×313231401021² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313231401001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677989815 + ... + 677990276.

It is an arithmetic number, because the mean of its divisors is an integer number (32543522208).

Almost surely, 2^313231401021 is an apocalyptic number.

It is an amenable number.

313231401021 is a deficient number, since it is larger than the sum of its proper divisors (207464954307).

313231401021 is a wasteful number, since it uses less digits than its factorization.

313231401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355980112.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 313231401021 its reverse (120104132313), we get a palindrome (433335533334).

The spelling of 313231401021 in words is "three hundred thirteen billion, two hundred thirty-one million, four hundred one thousand, twenty-one".