99294221521 has 48 divisors (see below), whose sum is σ = 117920013120. Its totient is φ = 83266444800.

The previous prime is 99294221519. The next prime is 99294221563. The reversal of 99294221521 is 12512249299.

It is a happy number.

It is not a de Polignac number, because 99294221521 - 2¹ = 99294221519 is a prime.

It is a super-2 number, since 2×99294221521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99294221581) 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 47 ways as a sum of consecutive naturals, for example, 83230101 + ... + 83231293.

It is an arithmetic number, because the mean of its divisors is an integer number (2456666940).

Almost surely, 2^99294221521 is an apocalyptic number.

It is an amenable number.

99294221521 is a deficient number, since it is larger than the sum of its proper divisors (18625791599).

99294221521 is a wasteful number, since it uses less digits than its factorization.

99294221521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2147 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The spelling of 99294221521 in words is "ninety-nine billion, two hundred ninety-four million, two hundred twenty-one thousand, five hundred twenty-one".