221022122137 has 2 divisors, whose sum is σ = 221022122138. Its totient is φ = 221022122136.

The previous prime is 221022122129. The next prime is 221022122207. The reversal of 221022122137 is 731221220122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166781575321 + 54240546816 = 408389^2 + 232896^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022122137 - 2³ = 221022122129 is a prime.

It is not a weakly prime, because it can be changed into another prime (221022126137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511061068 + 110511061069.

It is an arithmetic number, because the mean of its divisors is an integer number (110511061069).

Almost surely, 2^221022122137 is an apocalyptic number.

It is an amenable number.

221022122137 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022122137 is an equidigital number, since it uses as much as digits as its factorization.

221022122137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 221022122137 its reverse (731221220122), we get a palindrome (952243342259).

The spelling of 221022122137 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, one hundred thirty-seven".