222221198977 has 2 divisors, whose sum is σ = 222221198978. Its totient is φ = 222221198976.

The previous prime is 222221198923. The next prime is 222221198981. The reversal of 222221198977 is 779891122222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220809769216 + 1411429761 = 469904^2 + 37569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222221198977 is a prime.

It is a super-2 number, since 2×222221198977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222221198917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110599488 + 111110599489.

It is an arithmetic number, because the mean of its divisors is an integer number (111110599489).

Almost surely, 2^222221198977 is an apocalyptic number.

It is an amenable number.

222221198977 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221198977 is an equidigital number, since it uses as much as digits as its factorization.

222221198977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The spelling of 222221198977 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred ninety-eight thousand, nine hundred seventy-seven".