21118034099 has 2 divisors, whose sum is σ = 21118034100. Its totient is φ = 21118034098.

The previous prime is 21118033997. The next prime is 21118034137. The reversal of 21118034099 is 99043081112.

It is an a-pointer prime, because the next prime (21118034137) can be obtained adding 21118034099 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21118034099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21118037099) 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, 10559017049 + 10559017050.

It is an arithmetic number, because the mean of its divisors is an integer number (10559017050).

Almost surely, 2^21118034099 is an apocalyptic number.

21118034099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21118034099 is an equidigital number, since it uses as much as digits as its factorization.

21118034099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 21118034099 in words is "twenty-one billion, one hundred eighteen million, thirty-four thousand, ninety-nine".