221422000645777 has 2 divisors, whose sum is σ = 221422000645778. Its totient is φ = 221422000645776.

The previous prime is 221422000645753. The next prime is 221422000645891. The reversal of 221422000645777 is 777546000224122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152919959298561 + 68502041347216 = 12366081^2 + 8276596^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422000645777 - 2⁷ = 221422000645649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221422000645777.

It is not a weakly prime, because it can be changed into another prime (221422000645577) 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, 110711000322888 + 110711000322889.

It is an arithmetic number, because the mean of its divisors is an integer number (110711000322889).

Almost surely, 2^{221422000645777} is an apocalyptic number.

It is an amenable number.

221422000645777 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422000645777 is an equidigital number, since it uses as much as digits as its factorization.

221422000645777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 49.

Adding to 221422000645777 its reverse (777546000224122), we get a palindrome (998968000869899).

The spelling of 221422000645777 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, seven hundred seventy-seven".