1331303031021 has 16 divisors (see below), whose sum is σ = 1780095620160. Its totient is φ = 885026250240.

The previous prime is 1331303031011. The next prime is 1331303031043. The reversal of 1331303031021 is 1201303031331.

It is not a de Polignac number, because 1331303031021 - 2⁶ = 1331303030957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331303031011) 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 15 ways as a sum of consecutive naturals, for example, 1173091 + ... + 2009663.

It is an arithmetic number, because the mean of its divisors is an integer number (111255976260).

Almost surely, 2^{1331303031021} is an apocalyptic number.

It is an amenable number.

1331303031021 is a deficient number, since it is larger than the sum of its proper divisors (448792589139).

1331303031021 is an equidigital number, since it uses as much as digits as its factorization.

1331303031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838076.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 1331303031021 its reverse (1201303031331), we get a palindrome (2532606062352).

The spelling of 1331303031021 in words is "one trillion, three hundred thirty-one billion, three hundred three million, thirty-one thousand, twenty-one".