2312122312021 has 2 divisors, whose sum is σ = 2312122312022. Its totient is φ = 2312122312020.

The previous prime is 2312122312009. The next prime is 2312122312037. The reversal of 2312122312021 is 1202132212132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2271308211396 + 40814100625 = 1507086^2 + 202025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312122312021 - 2³³ = 2303532377429 is a prime.

It is a super-2 number, since 2×2312122312021² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2312122311983 and 2312122312001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2312122312051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156061156010 + 1156061156011.

It is an arithmetic number, because the mean of its divisors is an integer number (1156061156011).

Almost surely, 2^{2312122312021} is an apocalyptic number.

It is an amenable number.

2312122312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312122312021 is an equidigital number, since it uses as much as digits as its factorization.

2312122312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2312122312021 its reverse (1202132212132), we get a palindrome (3514254524153).

The spelling of 2312122312021 in words is "two trillion, three hundred twelve billion, one hundred twenty-two million, three hundred twelve thousand, twenty-one".