21222120012099 has 16 divisors (see below), whose sum is σ = 28357174953984. Its totient is φ = 14117598129600.

The previous prime is 21222120012073. The next prime is 21222120012101. The reversal of 21222120012099 is 99021002122212.

It is not a de Polignac number, because 21222120012099 - 2⁸ = 21222120011843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222120012199) 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, 120814 + ... + 6516044.

It is an arithmetic number, because the mean of its divisors is an integer number (1772323434624).

Almost surely, 2^{21222120012099} is an apocalyptic number.

21222120012099 is a deficient number, since it is larger than the sum of its proper divisors (7135054941885).

21222120012099 is a wasteful number, since it uses less digits than its factorization.

21222120012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6397618.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 21222120012099 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, twelve thousand, ninety-nine".