221220118037 has 2 divisors, whose sum is σ = 221220118038. Its totient is φ = 221220118036.

The previous prime is 221220117991. The next prime is 221220118043. The reversal of 221220118037 is 730811022122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213734234596 + 7485883441 = 462314^2 + 86521^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220118037 - 2¹² = 221220113941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220118837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610059018 + 110610059019.

It is an arithmetic number, because the mean of its divisors is an integer number (110610059019).

Almost surely, 2^221220118037 is an apocalyptic number.

It is an amenable number.

221220118037 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220118037 is an equidigital number, since it uses as much as digits as its factorization.

221220118037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 221220118037 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred eighteen thousand, thirty-seven".