2031123310221 has 16 divisors (see below), whose sum is σ = 2723566464000. Its totient is φ = 1346382697008.

The previous prime is 2031123310159. The next prime is 2031123310259. The reversal of 2031123310221 is 1220133211302.

It is not a de Polignac number, because 2031123310221 - 2¹⁷ = 2031123179149 is a prime.

It is a super-2 number, since 2×2031123310221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031123310421) 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 15 ways as a sum of consecutive naturals, for example, 5329180 + ... + 5697578.

It is an arithmetic number, because the mean of its divisors is an integer number (170222904000).

Almost surely, 2^{2031123310221} is an apocalyptic number.

It is an amenable number.

2031123310221 is a deficient number, since it is larger than the sum of its proper divisors (692443153779).

2031123310221 is a wasteful number, since it uses less digits than its factorization.

2031123310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378848.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2031123310221 its reverse (1220133211302), we get a palindrome (3251256521523).

The spelling of 2031123310221 in words is "two trillion, thirty-one billion, one hundred twenty-three million, three hundred ten thousand, two hundred twenty-one".