2131023112021 has 8 divisors (see below), whose sum is σ = 2243466940320. Its totient is φ = 2018607755472.

The previous prime is 2131023112007. The next prime is 2131023112037. The reversal of 2131023112021 is 1202113201312.

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 2131023112021 - 2¹¹ = 2131023109973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131023112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131023512021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6964210 + ... + 7263763.

It is an arithmetic number, because the mean of its divisors is an integer number (280433367540).

Almost surely, 2^{2131023112021} is an apocalyptic number.

It is an amenable number.

2131023112021 is a deficient number, since it is larger than the sum of its proper divisors (112443828299).

2131023112021 is a wasteful number, since it uses less digits than its factorization.

2131023112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14235875.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2131023112021 its reverse (1202113201312), we get a palindrome (3333136313333).

The spelling of 2131023112021 in words is "two trillion, one hundred thirty-one billion, twenty-three million, one hundred twelve thousand, twenty-one".