331213431021 has 32 divisors (see below), whose sum is σ = 485414899200. Its totient is φ = 199215718080.

The previous prime is 331213430993. The next prime is 331213431041. The reversal of 331213431021 is 120134312133.

It is not a de Polignac number, because 331213431021 - 2¹³ = 331213422829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331213430982 and 331213431000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331213431041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13551550 + ... + 13575968.

It is an arithmetic number, because the mean of its divisors is an integer number (15169215600).

Almost surely, 2^331213431021 is an apocalyptic number.

It is an amenable number.

331213431021 is a deficient number, since it is larger than the sum of its proper divisors (154201468179).

331213431021 is a wasteful number, since it uses less digits than its factorization.

331213431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27529.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 331213431021 its reverse (120134312133), we get a palindrome (451347743154).

The spelling of 331213431021 in words is "three hundred thirty-one billion, two hundred thirteen million, four hundred thirty-one thousand, twenty-one".