12122211977 has 2 divisors, whose sum is σ = 12122211978. Its totient is φ = 12122211976.

The previous prime is 12122211971. The next prime is 12122211989. The reversal of 12122211977 is 77911222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10087390096 + 2034821881 = 100436^2 + 45109^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122211977 - 2²⁶ = 12055103113 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122211971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061105988 + 6061105989.

It is an arithmetic number, because the mean of its divisors is an integer number (6061105989).

Almost surely, 2^12122211977 is an apocalyptic number.

It is an amenable number.

12122211977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122211977 is an equidigital number, since it uses as much as digits as its factorization.

12122211977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 35.

The spelling of 12122211977 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred seventy-seven".