21900099222 has 16 divisors (see below), whose sum is σ = 48666887280. Its totient is φ = 7300033056.

The previous prime is 21900099187. The next prime is 21900099241. The reversal of 21900099222 is 22299000912.

It is a super-2 number, since 2×21900099222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 202778643 + ... + 202778750.

It is an arithmetic number, because the mean of its divisors is an integer number (3041680455).

Almost surely, 2^21900099222 is an apocalyptic number.

21900099222 is an abundant number, since it is smaller than the sum of its proper divisors (26766788058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21900099222 is a wasteful number, since it uses less digits than its factorization.

21900099222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405557404 (or 405557398 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 21900099222 in words is "twenty-one billion, nine hundred million, ninety-nine thousand, two hundred twenty-two".