21221120099 has 8 divisors (see below), whose sum is σ = 21462352272. Its totient is φ = 20980825600.

The previous prime is 21221120093. The next prime is 21221120113. The reversal of 21221120099 is 99002112212.

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 21221120099 - 2¹² = 21221116003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221120093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188849 + ... + 279474.

It is an arithmetic number, because the mean of its divisors is an integer number (2682794034).

Almost surely, 2^21221120099 is an apocalyptic number.

21221120099 is a deficient number, since it is larger than the sum of its proper divisors (241232173).

21221120099 is a wasteful number, since it uses less digits than its factorization.

21221120099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468837.

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

The spelling of 21221120099 in words is "twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, ninety-nine".