2102310320021 has 4 divisors (see below), whose sum is σ = 2102348480544. Its totient is φ = 2102272159500.

The previous prime is 2102310319931. The next prime is 2102310320041. The reversal of 2102310320021 is 1200230132012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102310320021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102310320041) 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, 18997505 + ... + 19107846.

It is an arithmetic number, because the mean of its divisors is an integer number (525587120136).

Almost surely, 2^{2102310320021} is an apocalyptic number.

It is an amenable number.

2102310320021 is a deficient number, since it is larger than the sum of its proper divisors (38160523).

2102310320021 is an equidigital number, since it uses as much as digits as its factorization.

2102310320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38160522.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2102310320021 its reverse (1200230132012), we get a palindrome (3302540452033).

The spelling of 2102310320021 in words is "two trillion, one hundred two billion, three hundred ten million, three hundred twenty thousand, twenty-one".