1320230331021 has 32 divisors (see below), whose sum is σ = 2104695226368. Its totient is φ = 720356952960.

The previous prime is 1320230330999. The next prime is 1320230331031. The reversal of 1320230331021 is 1201330320231.

It is not a de Polignac number, because 1320230331021 - 2⁶ = 1320230330957 is a prime.

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 (1320230331031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16271965 + ... + 16352898.

It is an arithmetic number, because the mean of its divisors is an integer number (65771725824).

Almost surely, 2^{1320230331021} is an apocalyptic number.

It is an amenable number.

1320230331021 is a deficient number, since it is larger than the sum of its proper divisors (784464895347).

1320230331021 is a wasteful number, since it uses less digits than its factorization.

1320230331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32624961.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1320230331021 its reverse (1201330320231), we get a palindrome (2521560651252).

The spelling of 1320230331021 in words is "one trillion, three hundred twenty billion, two hundred thirty million, three hundred thirty-one thousand, twenty-one".