2122331311021 has 4 divisors (see below), whose sum is σ = 2125771070652. Its totient is φ = 2118891551392.

The previous prime is 2122331311013. The next prime is 2122331311073. The reversal of 2122331311021 is 1201131332212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 290601855625 + 1831729455396 = 539075^2 + 1353414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122331311021 - 2³ = 2122331311013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122331310983 and 2122331311001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122331311421) 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, 1719878890 + ... + 1719880123.

It is an arithmetic number, because the mean of its divisors is an integer number (531442767663).

Almost surely, 2^{2122331311021} is an apocalyptic number.

It is an amenable number.

2122331311021 is a deficient number, since it is larger than the sum of its proper divisors (3439759631).

2122331311021 is an equidigital number, since it uses as much as digits as its factorization.

2122331311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439759630.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2122331311021 its reverse (1201131332212), we get a palindrome (3323462643233).

The spelling of 2122331311021 in words is "two trillion, one hundred twenty-two billion, three hundred thirty-one million, three hundred eleven thousand, twenty-one".