21110212099 has 2 divisors, whose sum is σ = 21110212100. Its totient is φ = 21110212098.

The previous prime is 21110212003. The next prime is 21110212127. The reversal of 21110212099 is 99021201112.

It is an a-pointer prime, because the next prime (21110212127) can be obtained adding 21110212099 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110212099 - 2⁷ = 21110211971 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110212699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555106049 + 10555106050.

It is an arithmetic number, because the mean of its divisors is an integer number (10555106050).

Almost surely, 2^21110212099 is an apocalyptic number.

21110212099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110212099 is an equidigital number, since it uses as much as digits as its factorization.

21110212099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 21110212099 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand, ninety-nine".