3122112121 has 2 divisors, whose sum is σ = 3122112122. Its totient is φ = 3122112120.

The previous prime is 3122112113. The next prime is 3122112173. The reversal of 3122112121 is 1212112213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2964258025 + 157854096 = 54445^2 + 12564^2 .

It is a cyclic number.

It is not a de Polignac number, because 3122112121 - 2³ = 3122112113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3122112095 and 3122112104.

It is not a weakly prime, because it can be changed into another prime (3122118121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561056060 + 1561056061.

It is an arithmetic number, because the mean of its divisors is an integer number (1561056061).

Almost surely, 2^3122112121 is an apocalyptic number.

It is an amenable number.

3122112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122112121 is an equidigital number, since it uses as much as digits as its factorization.

3122112121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 16.

The square root of 3122112121 is about 55875.8634922092. The cubic root of 3122112121 is about 1461.5583724709.

Adding to 3122112121 its reverse (1212112213), we get a palindrome (4334224334).

The spelling of 3122112121 in words is "three billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".