2100020311321 has 6 divisors (see below), whose sum is σ = 2195295335450. Its totient is φ = 2008715079888.

The previous prime is 2100020311309. The next prime is 2100020311391. The reversal of 2100020311321 is 1231130200012.

It can be written as a sum of positive squares in only one way, i.e., 1508757739225 + 591262572096 = 1228315^2 + 768936^2 .

It is not a de Polignac number, because 2100020311321 - 2²⁷ = 2099886093593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100020311295 and 2100020311304.

It is not an unprimeable number, because it can be changed into a prime (2100020311391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1984895796 + ... + 1984896853.

Almost surely, 2^{2100020311321} is an apocalyptic number.

It is an amenable number.

2100020311321 is a deficient number, since it is larger than the sum of its proper divisors (95275024129).

2100020311321 is an equidigital number, since it uses as much as digits as its factorization.

2100020311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969792695 (or 3969792672 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2100020311321 its reverse (1231130200012), we get a palindrome (3331150511333).

The spelling of 2100020311321 in words is "two trillion, one hundred billion, twenty million, three hundred eleven thousand, three hundred twenty-one".