2131001223021 has 32 divisors (see below), whose sum is σ = 3450095452800. Its totient is φ = 1289245991040.

The previous prime is 2131001223017. The next prime is 2131001223037. The reversal of 2131001223021 is 1203221001312.

It is not a de Polignac number, because 2131001223021 - 2² = 2131001223017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131001222985 and 2131001223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131001223041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6136006 + ... + 6473991.

It is an arithmetic number, because the mean of its divisors is an integer number (107815482900).

Almost surely, 2^{2131001223021} is an apocalyptic number.

It is an amenable number.

2131001223021 is a deficient number, since it is larger than the sum of its proper divisors (1319094229779).

2131001223021 is a wasteful number, since it uses less digits than its factorization.

2131001223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610586 (or 12610580 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2131001223021 its reverse (1203221001312), we get a palindrome (3334222224333).

The spelling of 2131001223021 in words is "two trillion, one hundred thirty-one billion, one million, two hundred twenty-three thousand, twenty-one".