21200222999 has 4 divisors (see below), whose sum is σ = 21209166840. Its totient is φ = 21191279160.

The previous prime is 21200222983. The next prime is 21200223043. The reversal of 21200222999 is 99922200212.

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 21200222999 - 2⁴ = 21200222983 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 (21200222899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4468364 + ... + 4473105.

It is an arithmetic number, because the mean of its divisors is an integer number (5302291710).

Almost surely, 2^21200222999 is an apocalyptic number.

21200222999 is a deficient number, since it is larger than the sum of its proper divisors (8943841).

21200222999 is an equidigital number, since it uses as much as digits as its factorization.

21200222999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8943840.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 21200222999 in words is "twenty-one billion, two hundred million, two hundred twenty-two thousand, nine hundred ninety-nine".