21211222199 has 8 divisors (see below), whose sum is σ = 21246675840. Its totient is φ = 21175795456.

The previous prime is 21211222189. The next prime is 21211222217. The reversal of 21211222199 is 99122211212.

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 21211222199 - 2⁴ = 21211222183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211222169) 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, 2080787 + ... + 2090955.

It is an arithmetic number, because the mean of its divisors is an integer number (2655834480).

Almost surely, 2^21211222199 is an apocalyptic number.

21211222199 is a deficient number, since it is larger than the sum of its proper divisors (35453641).

21211222199 is a wasteful number, since it uses less digits than its factorization.

21211222199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13449.

The product of its digits is 2592, while the sum is 32.

The spelling of 21211222199 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred ninety-nine".