221222201199977 has 2 divisors, whose sum is σ = 221222201199978. Its totient is φ = 221222201199976.

The previous prime is 221222201199949. The next prime is 221222201200073. The reversal of 221222201199977 is 779991102222122.

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., 217203603633241 + 4018597566736 = 14737829^2 + 2004644^2 .

It is a cyclic number.

It is not a de Polignac number, because 221222201199977 - 2²⁴ = 221222184422761 is a prime.

It is not a weakly prime, because it can be changed into another prime (221222201193977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611100599988 + 110611100599989.

It is an arithmetic number, because the mean of its divisors is an integer number (110611100599989).

Almost surely, 2^{221222201199977} is an apocalyptic number.

It is an amenable number.

221222201199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222201199977 is an equidigital number, since it uses as much as digits as its factorization.

221222201199977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 221222201199977 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred ninety-nine thousand, nine hundred seventy-seven".