2121322331021 has 8 divisors (see below), whose sum is σ = 2124075287040. Its totient is φ = 2118570850368.

The previous prime is 2121322330943. The next prime is 2121322331033. The reversal of 2121322331021 is 1201332231212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121322331021 - 2²⁶ = 2121255222157 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 (2121322331321) 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, 2523365 + ... + 3257301.

It is an arithmetic number, because the mean of its divisors is an integer number (265509410880).

Almost surely, 2^{2121322331021} is an apocalyptic number.

It is an amenable number.

2121322331021 is a deficient number, since it is larger than the sum of its proper divisors (2752956019).

2121322331021 is a wasteful number, since it uses less digits than its factorization.

2121322331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737683.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121322331021 its reverse (1201332231212), we get a palindrome (3322654562233).

The spelling of 2121322331021 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, twenty-one".