21022112099 has 4 divisors (see below), whose sum is σ = 21023951136. Its totient is φ = 21020273064.

The previous prime is 21022112077. The next prime is 21022112101. The reversal of 21022112099 is 99021122012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022112099 - 2⁸ = 21022111843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022112029) 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, 902264 + ... + 925269.

It is an arithmetic number, because the mean of its divisors is an integer number (5255987784).

Almost surely, 2^21022112099 is an apocalyptic number.

21022112099 is a deficient number, since it is larger than the sum of its proper divisors (1839037).

21022112099 is a wasteful number, since it uses less digits than its factorization.

21022112099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839036.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21022112099 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, ninety-nine".