2131023222121 has 2 divisors, whose sum is σ = 2131023222122. Its totient is φ = 2131023222120.

The previous prime is 2131023222113. The next prime is 2131023222131. The reversal of 2131023222121 is 1212223201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684378282896 + 446644939225 = 1297836^2 + 668315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131023222121 - 2³ = 2131023222113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131023222092 and 2131023222101.

It is not a weakly prime, because it can be changed into another prime (2131023222131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065511611060 + 1065511611061.

It is an arithmetic number, because the mean of its divisors is an integer number (1065511611061).

Almost surely, 2^{2131023222121} is an apocalyptic number.

It is an amenable number.

2131023222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131023222121 is an equidigital number, since it uses as much as digits as its factorization.

2131023222121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2131023222121 its reverse (1212223201312), we get a palindrome (3343246423433).

The spelling of 2131023222121 in words is "two trillion, one hundred thirty-one billion, twenty-three million, two hundred twenty-two thousand, one hundred twenty-one".