2131012311021 has 12 divisors (see below), whose sum is σ = 3357958793280. Its totient is φ = 1291522612680.

The previous prime is 2131012311007. The next prime is 2131012311023. The reversal of 2131012311021 is 1201132101312.

2131012311021 is a `hidden beast` number, since 21 + 310 + 1 + 2 + 311 + 0 + 21 = 666.

It is not a de Polignac number, because 2131012311021 - 2¹⁰ = 2131012309997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131012310985 and 2131012311003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131012311023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10762688341 + ... + 10762688538.

It is an arithmetic number, because the mean of its divisors is an integer number (279829899440).

Almost surely, 2^{2131012311021} is an apocalyptic number.

It is an amenable number.

2131012311021 is a deficient number, since it is larger than the sum of its proper divisors (1226946482259).

2131012311021 is a wasteful number, since it uses less digits than its factorization.

2131012311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21525376896 (or 21525376893 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2131012311021 its reverse (1201132101312), we get a palindrome (3332144412333).

The spelling of 2131012311021 in words is "two trillion, one hundred thirty-one billion, twelve million, three hundred eleven thousand, twenty-one".