21221112220099 has 8 divisors (see below), whose sum is σ = 23160019041792. Its totient is φ = 19283824532040.

The previous prime is 21221112220031. The next prime is 21221112220109. The reversal of 21221112220099 is 99002221112212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21221112220099 - 2²⁹ = 21220575349187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221112320099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404755999 + ... + 404808424.

It is an arithmetic number, because the mean of its divisors is an integer number (2895002380224).

Almost surely, 2^{21221112220099} is an apocalyptic number.

21221112220099 is a deficient number, since it is larger than the sum of its proper divisors (1938906821693).

21221112220099 is a wasteful number, since it uses less digits than its factorization.

21221112220099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809566817.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 21221112220099 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, ninety-nine".