2131023332021 has 4 divisors (see below), whose sum is σ = 2131080035232. Its totient is φ = 2130966628812.

The previous prime is 2131023331961. The next prime is 2131023332051. The reversal of 2131023332021 is 1202333201312.

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-2131023332021 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 (2131023332051) 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, 28295195 + ... + 28370408.

It is an arithmetic number, because the mean of its divisors is an integer number (532770008808).

Almost surely, 2^{2131023332021} is an apocalyptic number.

It is an amenable number.

2131023332021 is a deficient number, since it is larger than the sum of its proper divisors (56703211).

2131023332021 is an equidigital number, since it uses as much as digits as its factorization.

2131023332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56703210.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2131023332021 its reverse (1202333201312), we get a palindrome (3333356533333).

The spelling of 2131023332021 in words is "two trillion, one hundred thirty-one billion, twenty-three million, three hundred thirty-two thousand, twenty-one".