1331313123021 has 64 divisors (see below), whose sum is σ = 2086623576576. Its totient is φ = 739174809600.

The previous prime is 1331313123017. The next prime is 1331313123061. The reversal of 1331313123021 is 1203213131331.

It is not a de Polignac number, because 1331313123021 - 2² = 1331313123017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331313122982 and 1331313123000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331313123061) 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 63 ways as a sum of consecutive naturals, for example, 229020511 + ... + 229026323.

It is an arithmetic number, because the mean of its divisors is an integer number (32603493384).

Almost surely, 2^{1331313123021} is an apocalyptic number.

It is an amenable number.

1331313123021 is a deficient number, since it is larger than the sum of its proper divisors (755310453555).

1331313123021 is a wasteful number, since it uses less digits than its factorization.

1331313123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1331313123021 its reverse (1203213131331), we get a palindrome (2534526254352).

The spelling of 1331313123021 in words is "one trillion, three hundred thirty-one billion, three hundred thirteen million, one hundred twenty-three thousand, twenty-one".