21102111001099 has 2 divisors, whose sum is σ = 21102111001100. Its totient is φ = 21102111001098.

The previous prime is 21102111001043. The next prime is 21102111001141. The reversal of 21102111001099 is 99010011120112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102111001099 - 2²⁹ = 21101574130187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102111004099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551055500549 + 10551055500550.

It is an arithmetic number, because the mean of its divisors is an integer number (10551055500550).

Almost surely, 2^{21102111001099} is an apocalyptic number.

21102111001099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102111001099 is an equidigital number, since it uses as much as digits as its factorization.

21102111001099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 21102111001099 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one thousand, ninety-nine".