2121313023021 has 8 divisors (see below), whose sum is σ = 2828487289600. Its totient is φ = 1414173719232.

The previous prime is 2121313022987. The next prime is 2121313023041. The reversal of 2121313023021 is 1203203131212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121313023021 - 2²⁷ = 2121178805293 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 (2121313023041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8598796 + ... + 8842053.

It is an arithmetic number, because the mean of its divisors is an integer number (353560911200).

Almost surely, 2^{2121313023021} is an apocalyptic number.

It is an amenable number.

2121313023021 is a deficient number, since it is larger than the sum of its proper divisors (707174266579).

2121313023021 is a wasteful number, since it uses less digits than its factorization.

2121313023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17481395.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2121313023021 its reverse (1203203131212), we get a palindrome (3324516154233).

The spelling of 2121313023021 in words is "two trillion, one hundred twenty-one billion, three hundred thirteen million, twenty-three thousand, twenty-one".