21033110099 has 2 divisors, whose sum is σ = 21033110100. Its totient is φ = 21033110098.

The previous prime is 21033110071. The next prime is 21033110191. The reversal of 21033110099 is 99001133012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033110099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21033110899) 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, 10516555049 + 10516555050.

It is an arithmetic number, because the mean of its divisors is an integer number (10516555050).

Almost surely, 2^21033110099 is an apocalyptic number.

21033110099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033110099 is an equidigital number, since it uses as much as digits as its factorization.

21033110099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The spelling of 21033110099 in words is "twenty-one billion, thirty-three million, one hundred ten thousand, ninety-nine".