221422000645577 has 2 divisors, whose sum is σ = 221422000645578. Its totient is φ = 221422000645576.

The previous prime is 221422000645493. The next prime is 221422000645591. The reversal of 221422000645577 is 775546000224122.

221422000645577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159194341466176 + 62227659179401 = 12617224^2 + 7888451^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422000645577 - 2¹⁰ = 221422000644553 is a prime.

It is not a weakly prime, because it can be changed into another prime (221422000645777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110711000322788 + 110711000322789.

It is an arithmetic number, because the mean of its divisors is an integer number (110711000322789).

Almost surely, 2^{221422000645577} is an apocalyptic number.

It is an amenable number.

221422000645577 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422000645577 is an equidigital number, since it uses as much as digits as its factorization.

221422000645577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 47.

Adding to 221422000645577 its reverse (775546000224122), we get a palindrome (996968000869699).

The spelling of 221422000645577 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred seventy-seven".