21133311099 has 64 divisors (see below), whose sum is σ = 32248627200. Its totient is φ = 12236618240.

The previous prime is 21133311079. The next prime is 21133311151. The reversal of 21133311099 is 99011333112.

It is not a de Polignac number, because 21133311099 - 2⁷ = 21133310971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21133311019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3911602 + ... + 3917000.

It is an arithmetic number, because the mean of its divisors is an integer number (503884800).

Almost surely, 2^21133311099 is an apocalyptic number.

21133311099 is a deficient number, since it is larger than the sum of its proper divisors (11115316101).

21133311099 is a wasteful number, since it uses less digits than its factorization.

21133311099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560.

The product of its (nonzero) digits is 4374, while the sum is 33.

The spelling of 21133311099 in words is "twenty-one billion, one hundred thirty-three million, three hundred eleven thousand, ninety-nine".