12122331961 has 2 divisors, whose sum is σ = 12122331962. Its totient is φ = 12122331960.

The previous prime is 12122331943. The next prime is 12122332007. The reversal of 12122331961 is 16913322121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12002298025 + 120033936 = 109555^2 + 10956^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122331961 - 2⁹ = 12122331449 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122331901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061165980 + 6061165981.

It is an arithmetic number, because the mean of its divisors is an integer number (6061165981).

Almost surely, 2^12122331961 is an apocalyptic number.

It is an amenable number.

12122331961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122331961 is an equidigital number, since it uses as much as digits as its factorization.

12122331961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The spelling of 12122331961 in words is "twelve billion, one hundred twenty-two million, three hundred thirty-one thousand, nine hundred sixty-one".