21100102231099 has 2 divisors, whose sum is σ = 21100102231100. Its totient is φ = 21100102231098.

The previous prime is 21100102231097. The next prime is 21100102231123. The reversal of 21100102231099 is 99013220100112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100102231099 - 2¹ = 21100102231097 is a prime.

Together with 21100102231097, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21100102231099.

It is not a weakly prime, because it can be changed into another prime (21100102231097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550051115549 + 10550051115550.

It is an arithmetic number, because the mean of its divisors is an integer number (10550051115550).

Almost surely, 2^{21100102231099} is an apocalyptic number.

21100102231099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100102231099 is an equidigital number, since it uses as much as digits as its factorization.

21100102231099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 21100102231099 in words is "twenty-one trillion, one hundred billion, one hundred two million, two hundred thirty-one thousand, ninety-nine".