21312132199 has 2 divisors, whose sum is σ = 21312132200. Its totient is φ = 21312132198.

The previous prime is 21312132071. The next prime is 21312132203. The reversal of 21312132199 is 99123121312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21312132199 - 2⁷ = 21312132071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21312132899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656066099 + 10656066100.

It is an arithmetic number, because the mean of its divisors is an integer number (10656066100).

Almost surely, 2^21312132199 is an apocalyptic number.

21312132199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312132199 is an equidigital number, since it uses as much as digits as its factorization.

21312132199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The spelling of 21312132199 in words is "twenty-one billion, three hundred twelve million, one hundred thirty-two thousand, one hundred ninety-nine".