21010222099 has 4 divisors (see below), whose sum is σ = 21010684000. Its totient is φ = 21009760200.

The previous prime is 21010222087. The next prime is 21010222127. The reversal of 21010222099 is 99022201012.

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 21010222099 - 2²⁷ = 20876004371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010222049) 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, 154224 + ... + 256525.

It is an arithmetic number, because the mean of its divisors is an integer number (5252671000).

Almost surely, 2^21010222099 is an apocalyptic number.

21010222099 is a deficient number, since it is larger than the sum of its proper divisors (461901).

21010222099 is an equidigital number, since it uses as much as digits as its factorization.

21010222099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461900.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21010222099 in words is "twenty-one billion, ten million, two hundred twenty-two thousand, ninety-nine".