100921099 has 2 divisors, whose sum is σ = 100921100. Its totient is φ = 100921098.

The previous prime is 100921097. The next prime is 100921147. The reversal of 100921099 is 990129001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100921099 - 2¹ = 100921097 is a prime.

Together with 100921097, 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 100921099.

It is not a weakly prime, because it can be changed into another prime (100921097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50460549 + 50460550.

It is an arithmetic number, because the mean of its divisors is an integer number (50460550).

Almost surely, 2^100921099 is an apocalyptic number.

100921099 is a deficient number, since it is larger than the sum of its proper divisors (1).

100921099 is an equidigital number, since it uses as much as digits as its factorization.

100921099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 100921099 is about 10045.9493827114. The cubic root of 100921099 is about 465.5796509683.

The spelling of 100921099 in words is "one hundred million, nine hundred twenty-one thousand, ninety-nine".