2131222311021 has 8 divisors (see below), whose sum is σ = 2851670843680. Its totient is φ = 1415794326192.

The previous prime is 2131222311019. The next prime is 2131222311077. The reversal of 2131222311021 is 1201132221312.

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

It is not a de Polignac number, because 2131222311021 - 2¹ = 2131222311019 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 (2131222311721) 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, 1255135966 + ... + 1255137663.

It is an arithmetic number, because the mean of its divisors is an integer number (356458855460).

Almost surely, 2^{2131222311021} is an apocalyptic number.

It is an amenable number.

2131222311021 is a deficient number, since it is larger than the sum of its proper divisors (720448532659).

2131222311021 is a wasteful number, since it uses less digits than its factorization.

2131222311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510273915.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2131222311021 its reverse (1201132221312), we get a palindrome (3332354532333).

The spelling of 2131222311021 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-two million, three hundred eleven thousand, twenty-one".