99888575221 has 2 divisors, whose sum is σ = 99888575222. Its totient is φ = 99888575220.

The previous prime is 99888575179. The next prime is 99888575249. The reversal of 99888575221 is 12257588899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89583483025 + 10305092196 = 299305^2 + 101514^2 .

It is a cyclic number.

It is not a de Polignac number, because 99888575221 - 2¹³ = 99888567029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99888573221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944287610 + 49944287611.

It is an arithmetic number, because the mean of its divisors is an integer number (49944287611).

Almost surely, 2^99888575221 is an apocalyptic number.

It is an amenable number.

99888575221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99888575221 is an equidigital number, since it uses as much as digits as its factorization.

99888575221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 64.

The spelling of 99888575221 in words is "ninety-nine billion, eight hundred eighty-eight million, five hundred seventy-five thousand, two hundred twenty-one".