21100202219 has 8 divisors (see below), whose sum is σ = 21501659520. Its totient is φ = 20698868736.

The previous prime is 21100202177. The next prime is 21100202257. The reversal of 21100202219 is 91220200112.

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 21100202219 - 2¹² = 21100198123 is a prime.

It is a super-2 number, since 2×21100202219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100202219.

It is not an unprimeable number, because it can be changed into a prime (21100202119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359462 + ... + 414020.

It is an arithmetic number, because the mean of its divisors is an integer number (2687707440).

Almost surely, 2^21100202219 is an apocalyptic number.

21100202219 is a deficient number, since it is larger than the sum of its proper divisors (401457301).

21100202219 is an equidigital number, since it uses as much as digits as its factorization.

21100202219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61909.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21100202219 in words is "twenty-one billion, one hundred million, two hundred two thousand, two hundred nineteen".