21000022199 has 16 divisors (see below), whose sum is σ = 23031755040. Its totient is φ = 19029029760.

The previous prime is 21000022163. The next prime is 21000022207. The reversal of 21000022199 is 99122000012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21000022199 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 (21000022399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377624 + ... + 429650.

It is an arithmetic number, because the mean of its divisors is an integer number (1439484690).

Almost surely, 2^21000022199 is an apocalyptic number.

21000022199 is a deficient number, since it is larger than the sum of its proper divisors (2031732841).

21000022199 is a wasteful number, since it uses less digits than its factorization.

21000022199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52610.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21000022199 in words is "twenty-one billion, twenty-two thousand, one hundred ninety-nine".