221536050877049 has 2 divisors, whose sum is σ = 221536050877050. Its totient is φ = 221536050877048.

The previous prime is 221536050877039. The next prime is 221536050877069. The reversal of 221536050877049 is 940778050635122.

221536050877049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123342458581225 + 98193592295824 = 11105965^2 + 9909268^2 .

It is a cyclic number.

It is not a de Polignac number, because 221536050877049 - 2⁴ = 221536050877033 is a prime.

It is a super-2 number, since 2×221536050877049² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221536050877039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110768025438524 + 110768025438525.

It is an arithmetic number, because the mean of its divisors is an integer number (110768025438525).

It is a 1-persistent number, because it is pandigital, but 2⋅221536050877049 = 443072101754098 is not.

Almost surely, 2^{221536050877049} is an apocalyptic number.

It is an amenable number.

221536050877049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221536050877049 is an equidigital number, since it uses as much as digits as its factorization.

221536050877049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 221536050877049 in words is "two hundred twenty-one trillion, five hundred thirty-six billion, fifty million, eight hundred seventy-seven thousand, forty-nine".