12122020961 has 2 divisors, whose sum is σ = 12122020962. Its totient is φ = 12122020960.

The previous prime is 12122020949. The next prime is 12122021017. The reversal of 12122020961 is 16902022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11529390625 + 592630336 = 107375^2 + 24344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122020961 - 2²² = 12117826657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12122020961.

It is not a weakly prime, because it can be changed into another prime (12122020921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061010480 + 6061010481.

It is an arithmetic number, because the mean of its divisors is an integer number (6061010481).

Almost surely, 2^12122020961 is an apocalyptic number.

It is an amenable number.

12122020961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122020961 is an equidigital number, since it uses as much as digits as its factorization.

12122020961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 12122020961 in words is "twelve billion, one hundred twenty-two million, twenty thousand, nine hundred sixty-one".