99240233221 has 4 divisors (see below), whose sum is σ = 99290029612. Its totient is φ = 99190436832.

The previous prime is 99240233207. The next prime is 99240233233. The reversal of 99240233221 is 12233204299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36294441121 + 62945792100 = 190511^2 + 250890^2 .

It is a cyclic number.

It is not a de Polignac number, because 99240233221 - 2¹⁹ = 99239708933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99240233201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24895206 + ... + 24899191.

It is an arithmetic number, because the mean of its divisors is an integer number (24822507403).

Almost surely, 2^99240233221 is an apocalyptic number.

It is an amenable number.

99240233221 is a deficient number, since it is larger than the sum of its proper divisors (49796391).

99240233221 is a wasteful number, since it uses less digits than its factorization.

99240233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49796390.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 99240233221 in words is "ninety-nine billion, two hundred forty million, two hundred thirty-three thousand, two hundred twenty-one".