21002222099 has 2 divisors, whose sum is σ = 21002222100. Its totient is φ = 21002222098.

The previous prime is 21002222089. The next prime is 21002222123. The reversal of 21002222099 is 99022220012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002222099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002222009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501111049 + 10501111050.

It is an arithmetic number, because the mean of its divisors is an integer number (10501111050).

Almost surely, 2^21002222099 is an apocalyptic number.

21002222099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002222099 is an equidigital number, since it uses as much as digits as its factorization.

21002222099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 21002222099 in words is "twenty-one billion, two million, two hundred twenty-two thousand, ninety-nine".