99242088221 has 4 divisors (see below), whose sum is σ = 99850935552. Its totient is φ = 98633240892.

The previous prime is 99242088139. The next prime is 99242088289. The reversal of 99242088221 is 12288024299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12288024299 = 19 ⋅646738121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99242088221 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 (99242388221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304423421 + ... + 304423746.

It is an arithmetic number, because the mean of its divisors is an integer number (24962733888).

Almost surely, 2^99242088221 is an apocalyptic number.

It is an amenable number.

99242088221 is a deficient number, since it is larger than the sum of its proper divisors (608847331).

99242088221 is a wasteful number, since it uses less digits than its factorization.

99242088221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608847330.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 99242088221 in words is "ninety-nine billion, two hundred forty-two million, eighty-eight thousand, two hundred twenty-one".