2031113031021 has 12 divisors (see below), whose sum is σ = 2936085008220. Its totient is φ = 1353034550400.

The previous prime is 2031113031007. The next prime is 2031113031097. The reversal of 2031113031021 is 1201303111302.

2031113031021 is a `hidden beast` number, since 20 + 311 + 1 + 3 + 0 + 310 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 341856549225 + 1689256481796 = 584685^2 + 1299714^2 .

It is not a de Polignac number, because 2031113031021 - 2¹⁵ = 2031112998253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2031113030985 and 2031113031003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031113031721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86721276 + ... + 86744693.

It is an arithmetic number, because the mean of its divisors is an integer number (244673750685).

Almost surely, 2^{2031113031021} is an apocalyptic number.

It is an amenable number.

2031113031021 is a deficient number, since it is larger than the sum of its proper divisors (904971977199).

2031113031021 is a wasteful number, since it uses less digits than its factorization.

2031113031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173467276 (or 173467273 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 2031113031021 its reverse (1201303111302), we get a palindrome (3232416142323).

The spelling of 2031113031021 in words is "two trillion, thirty-one billion, one hundred thirteen million, thirty-one thousand, twenty-one".