2163138831421 has 16 divisors (see below), whose sum is σ = 2193938208000. Its totient is φ = 2132550782208.

The previous prime is 2163138831419. The next prime is 2163138831463. The reversal of 2163138831421 is 1241388313612.

It is a happy number.

It is not a de Polignac number, because 2163138831421 - 2¹ = 2163138831419 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 (2163198831421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81097275 + ... + 81123943.

It is an arithmetic number, because the mean of its divisors is an integer number (137121138000).

Almost surely, 2^{2163138831421} is an apocalyptic number.

It is an amenable number.

2163138831421 is a deficient number, since it is larger than the sum of its proper divisors (30799376579).

2163138831421 is a wasteful number, since it uses less digits than its factorization.

2163138831421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30588.

The product of its digits is 165888, while the sum is 43.

The spelling of 2163138831421 in words is "two trillion, one hundred sixty-three billion, one hundred thirty-eight million, eight hundred thirty-one thousand, four hundred twenty-one".