21333996099 has 48 divisors (see below), whose sum is σ = 35161910784. Its totient is φ = 12348057600.

The previous prime is 21333996097. The next prime is 21333996109. The reversal of 21333996099 is 99069933312.

It is a happy number.

21333996099 is a `hidden beast` number, since 21 + 3 + 3 + 3 + 9 + 9 + 609 + 9 = 666.

It is not a de Polignac number, because 21333996099 - 2¹ = 21333996097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21333996091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4196239 + ... + 4201319.

It is an arithmetic number, because the mean of its divisors is an integer number (732539808).

Almost surely, 2^21333996099 is an apocalyptic number.

21333996099 is a deficient number, since it is larger than the sum of its proper divisors (13827914685).

21333996099 is a wasteful number, since it uses less digits than its factorization.

21333996099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 2125764, while the sum is 54.

The spelling of 21333996099 in words is "twenty-one billion, three hundred thirty-three million, nine hundred ninety-six thousand, ninety-nine".