12220958977 has 2 divisors, whose sum is σ = 12220958978. Its totient is φ = 12220958976.

The previous prime is 12220958969. The next prime is 12220958987. The reversal of 12220958977 is 77985902221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6673092721 + 5547866256 = 81689^2 + 74484^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220958977 - 2³ = 12220958969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12220958987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110479488 + 6110479489.

It is an arithmetic number, because the mean of its divisors is an integer number (6110479489).

Almost surely, 2^12220958977 is an apocalyptic number.

It is an amenable number.

12220958977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220958977 is an equidigital number, since it uses as much as digits as its factorization.

12220958977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 12220958977 in words is "twelve billion, two hundred twenty million, nine hundred fifty-eight thousand, nine hundred seventy-seven".