21200122199 has 2 divisors, whose sum is σ = 21200122200. Its totient is φ = 21200122198.

The previous prime is 21200122193. The next prime is 21200122201. The reversal of 21200122199 is 99122100212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200122199 is a prime.

Together with 21200122201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200122193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600061099 + 10600061100.

It is an arithmetic number, because the mean of its divisors is an integer number (10600061100).

Almost surely, 2^21200122199 is an apocalyptic number.

21200122199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200122199 is an equidigital number, since it uses as much as digits as its factorization.

21200122199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21200122199 in words is "twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred ninety-nine".