21211030199 has 2 divisors, whose sum is σ = 21211030200. Its totient is φ = 21211030198.

The previous prime is 21211030193. The next prime is 21211030231. The reversal of 21211030199 is 99103011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211030199 - 2²⁴ = 21194252983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211030193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605515099 + 10605515100.

It is an arithmetic number, because the mean of its divisors is an integer number (10605515100).

Almost surely, 2^21211030199 is an apocalyptic number.

21211030199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211030199 is an equidigital number, since it uses as much as digits as its factorization.

21211030199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 21211030199 in words is "twenty-one billion, two hundred eleven million, thirty thousand, one hundred ninety-nine".