2031131032321 has 4 divisors (see below), whose sum is σ = 2032623415044. Its totient is φ = 2029638649600.

The previous prime is 2031131032297. The next prime is 2031131032349. The reversal of 2031131032321 is 1232301311302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 873701478400 + 1157429553921 = 934720^2 + 1075839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031131032321 is a prime.

It is a super-2 number, since 2×2031131032321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031131032292 and 2031131032301.

It is not an unprimeable number, because it can be changed into a prime (2031131032421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746189320 + ... + 746192041.

It is an arithmetic number, because the mean of its divisors is an integer number (508155853761).

Almost surely, 2^{2031131032321} is an apocalyptic number.

It is an amenable number.

2031131032321 is a deficient number, since it is larger than the sum of its proper divisors (1492382723).

2031131032321 is a wasteful number, since it uses less digits than its factorization.

2031131032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492382722.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2031131032321 its reverse (1232301311302), we get a palindrome (3263432343623).

The spelling of 2031131032321 in words is "two trillion, thirty-one billion, one hundred thirty-one million, thirty-two thousand, three hundred twenty-one".