21220012199 has 4 divisors (see below), whose sum is σ = 21414691320. Its totient is φ = 21025333080.

The previous prime is 21220012183. The next prime is 21220012201. The reversal of 21220012199 is 99121002212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21220012199 - 2⁴ = 21220012183 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 (21220012139) 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 3 ways as a sum of consecutive naturals, for example, 97339397 + ... + 97339614.

It is an arithmetic number, because the mean of its divisors is an integer number (5353672830).

Almost surely, 2^21220012199 is an apocalyptic number.

21220012199 is a deficient number, since it is larger than the sum of its proper divisors (194679121).

21220012199 is a wasteful number, since it uses less digits than its factorization.

21220012199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194679120.

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

The spelling of 21220012199 in words is "twenty-one billion, two hundred twenty million, twelve thousand, one hundred ninety-nine".