2031012331021 has 2 divisors, whose sum is σ = 2031012331022. Its totient is φ = 2031012331020.

The previous prime is 2031012330989. The next prime is 2031012331111. The reversal of 2031012331021 is 1201332101302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1206348558921 + 824663772100 = 1098339^2 + 908110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031012331021 - 2⁵ = 2031012330989 is a prime.

It is a super-2 number, since 2×2031012331021² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2031012331021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031012331921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015506165510 + 1015506165511.

It is an arithmetic number, because the mean of its divisors is an integer number (1015506165511).

Almost surely, 2^{2031012331021} is an apocalyptic number.

It is an amenable number.

2031012331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031012331021 is an equidigital number, since it uses as much as digits as its factorization.

2031012331021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2031012331021 its reverse (1201332101302), we get a palindrome (3232344432323).

The spelling of 2031012331021 in words is "two trillion, thirty-one billion, twelve million, three hundred thirty-one thousand, twenty-one".