221022099998977 has 2 divisors, whose sum is σ = 221022099998978. Its totient is φ = 221022099998976.

The previous prime is 221022099998897. The next prime is 221022099999013. The reversal of 221022099998977 is 779899990220122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191603289463056 + 29418810535921 = 13842084^2 + 5423911^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022099998977 - 2⁷ = 221022099998849 is a prime.

It is not a weakly prime, because it can be changed into another prime (221022099998377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511049999488 + 110511049999489.

It is an arithmetic number, because the mean of its divisors is an integer number (110511049999489).

Almost surely, 2^{221022099998977} is an apocalyptic number.

It is an amenable number.

221022099998977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022099998977 is an equidigital number, since it uses as much as digits as its factorization.

221022099998977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370355328, while the sum is 76.

The spelling of 221022099998977 in words is "two hundred twenty-one trillion, twenty-two billion, ninety-nine million, nine hundred ninety-eight thousand, nine hundred seventy-seven".