1222118977 has 2 divisors, whose sum is σ = 1222118978. Its totient is φ = 1222118976.

The previous prime is 1222118951. The next prime is 1222118981. The reversal of 1222118977 is 7798112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050797056 + 171321921 = 32416^2 + 13089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222118977 - 2²⁷ = 1087901249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222118987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611059488 + 611059489.

It is an arithmetic number, because the mean of its divisors is an integer number (611059489).

Almost surely, 2^1222118977 is an apocalyptic number.

It is an amenable number.

1222118977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222118977 is an equidigital number, since it uses as much as digits as its factorization.

1222118977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 40.

The square root of 1222118977 is about 34958.8183009666. The cubic root of 1222118977 is about 1069.1480034604.

The spelling of 1222118977 in words is "one billion, two hundred twenty-two million, one hundred eighteen thousand, nine hundred seventy-seven".