100121221099 has 2 divisors, whose sum is σ = 100121221100. Its totient is φ = 100121221098.

The previous prime is 100121221093. The next prime is 100121221147. The reversal of 100121221099 is 990122121001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100121221099 - 2²⁵ = 100087666667 is a prime.

It is not a weakly prime, because it can be changed into another prime (100121221093) 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, 50060610549 + 50060610550.

It is an arithmetic number, because the mean of its divisors is an integer number (50060610550).

Almost surely, 2^100121221099 is an apocalyptic number.

100121221099 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121221099 is an equidigital number, since it uses as much as digits as its factorization.

100121221099 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 100121221099 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety-nine".