21201110102099 has 2 divisors, whose sum is σ = 21201110102100. Its totient is φ = 21201110102098.

The previous prime is 21201110102087. The next prime is 21201110102177. The reversal of 21201110102099 is 99020101110212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201110102099 - 2²⁸ = 21200841666643 is a prime.

It is a super-2 number, since 2×21201110102099² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201110102399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600555051049 + 10600555051050.

It is an arithmetic number, because the mean of its divisors is an integer number (10600555051050).

Almost surely, 2^{21201110102099} is an apocalyptic number.

21201110102099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201110102099 is an equidigital number, since it uses as much as digits as its factorization.

21201110102099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 21201110102099 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred two thousand, ninety-nine".