221022122077 has 2 divisors, whose sum is σ = 221022122078. Its totient is φ = 221022122076.

The previous prime is 221022122059. The next prime is 221022122129. The reversal of 221022122077 is 770221220122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134182283481 + 86839838596 = 366309^2 + 294686^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022122077 - 2³¹ = 218874638429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221022122677) 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, 110511061038 + 110511061039.

It is an arithmetic number, because the mean of its divisors is an integer number (110511061039).

Almost surely, 2^221022122077 is an apocalyptic number.

It is an amenable number.

221022122077 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022122077 is an equidigital number, since it uses as much as digits as its factorization.

221022122077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 221022122077 its reverse (770221220122), we get a palindrome (991243342199).

The spelling of 221022122077 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, seventy-seven".