21120022099 has 16 divisors (see below), whose sum is σ = 23542617600. Its totient is φ = 18783288160.

The previous prime is 21120022087. The next prime is 21120022103. The reversal of 21120022099 is 99022002112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120022099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120022019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150102 + ... + 254500.

It is an arithmetic number, because the mean of its divisors is an integer number (1471413600).

Almost surely, 2^21120022099 is an apocalyptic number.

21120022099 is a deficient number, since it is larger than the sum of its proper divisors (2422595501).

21120022099 is a wasteful number, since it uses less digits than its factorization.

21120022099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104810.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21120022099 in words is "twenty-one billion, one hundred twenty million, twenty-two thousand, ninety-nine".