222120011977 has 2 divisors, whose sum is σ = 222120011978. Its totient is φ = 222120011976.

The previous prime is 222120011951. The next prime is 222120012083. The reversal of 222120011977 is 779110021222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199961903241 + 22158108736 = 447171^2 + 148856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120011977 is a prime.

It is not a weakly prime, because it can be changed into another prime (222120018977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060005988 + 111060005989.

It is an arithmetic number, because the mean of its divisors is an integer number (111060005989).

Almost surely, 2^222120011977 is an apocalyptic number.

It is an amenable number.

222120011977 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120011977 is an equidigital number, since it uses as much as digits as its factorization.

222120011977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 222120011977 in words is "two hundred twenty-two billion, one hundred twenty million, eleven thousand, nine hundred seventy-seven".