2021312031031 has 2 divisors, whose sum is σ = 2021312031032. Its totient is φ = 2021312031030.

The previous prime is 2021312031023. The next prime is 2021312031061. The reversal of 2021312031031 is 1301302131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021312031031 - 2³ = 2021312031023 is a prime.

It is a super-2 number, since 2×2021312031031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021312031061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010656015515 + 1010656015516.

It is an arithmetic number, because the mean of its divisors is an integer number (1010656015516).

Almost surely, 2^{2021312031031} is an apocalyptic number.

2021312031031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021312031031 is an equidigital number, since it uses as much as digits as its factorization.

2021312031031 is an evil number, because the sum of its binary digits is even.

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

Adding to 2021312031031 its reverse (1301302131202), we get a palindrome (3322614162233).

The spelling of 2021312031031 in words is "two trillion, twenty-one billion, three hundred twelve million, thirty-one thousand, thirty-one".