2131113132221 has 8 divisors (see below), whose sum is σ = 2256897851640. Its totient is φ = 2005375648768.

The previous prime is 2131113132191. The next prime is 2131113132233. The reversal of 2131113132221 is 1222313111312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 497857248100 + 1633255884121 = 705590^2 + 1277989^2 .

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 2131113132221 - 2³⁸ = 1856235225277 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 (2131113137221) 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, 11716076 + ... + 11896581.

It is an arithmetic number, because the mean of its divisors is an integer number (282112231455).

Almost surely, 2^{2131113132221} is an apocalyptic number.

It is an amenable number.

2131113132221 is a deficient number, since it is larger than the sum of its proper divisors (125784719419).

2131113132221 is a wasteful number, since it uses less digits than its factorization.

2131113132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23617983.

The product of its digits is 432, while the sum is 23.

Adding to 2131113132221 its reverse (1222313111312), we get a palindrome (3353426243533).

The spelling of 2131113132221 in words is "two trillion, one hundred thirty-one billion, one hundred thirteen million, one hundred thirty-two thousand, two hundred twenty-one".