1021345320331 has 4 divisors (see below), whose sum is σ = 1167251794672. Its totient is φ = 875438845992.

The previous prime is 1021345320323. The next prime is 1021345320337. The reversal of 1021345320331 is 1330235431201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021345320331 - 2³ = 1021345320323 is a prime.

It is a super-2 number, since 2×1021345320331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021345320331.

It is not an unprimeable number, because it can be changed into a prime (1021345320337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72953237160 + ... + 72953237173.

It is an arithmetic number, because the mean of its divisors is an integer number (291812948668).

Almost surely, 2^{1021345320331} is an apocalyptic number.

1021345320331 is a deficient number, since it is larger than the sum of its proper divisors (145906474341).

1021345320331 is an equidigital number, since it uses as much as digits as its factorization.

1021345320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145906474340.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 1021345320331 in words is "one trillion, twenty-one billion, three hundred forty-five million, three hundred twenty thousand, three hundred thirty-one".