2122130342021 has 4 divisors (see below), whose sum is σ = 2122138106700. Its totient is φ = 2122122577344.

The previous prime is 2122130341987. The next prime is 2122130342023. The reversal of 2122130342021 is 1202430312212.

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 1577912822500 + 544217519521 = 1256150^2 + 737711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122130342021 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 (2122130342023) 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, 3456836 + ... + 4024173.

It is an arithmetic number, because the mean of its divisors is an integer number (530534526675).

Almost surely, 2^{2122130342021} is an apocalyptic number.

It is an amenable number.

2122130342021 is a deficient number, since it is larger than the sum of its proper divisors (7764679).

2122130342021 is an equidigital number, since it uses as much as digits as its factorization.

2122130342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764678.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2122130342021 its reverse (1202430312212), we get a palindrome (3324560654233).

The spelling of 2122130342021 in words is "two trillion, one hundred twenty-two billion, one hundred thirty million, three hundred forty-two thousand, twenty-one".