21112120012099 has 2 divisors, whose sum is σ = 21112120012100. Its totient is φ = 21112120012098.

The previous prime is 21112120011991. The next prime is 21112120012147. The reversal of 21112120012099 is 99021002121112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112120012099 is a prime.

It is a super-2 number, since 2×21112120012099² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21112120012099.

It is not a weakly prime, because it can be changed into another prime (21112120013099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556060006049 + 10556060006050.

It is an arithmetic number, because the mean of its divisors is an integer number (10556060006050).

Almost surely, 2^{21112120012099} is an apocalyptic number.

21112120012099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112120012099 is an equidigital number, since it uses as much as digits as its factorization.

21112120012099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21112120012099 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, twelve thousand, ninety-nine".