121100099 has 4 divisors (see below), whose sum is σ = 121242264. Its totient is φ = 120957936.

The previous prime is 121100093. The next prime is 121100107. The reversal of 121100099 is 990001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121100099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100093) 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 in 3 ways as a sum of consecutive naturals, for example, 69797 + ... + 71510.

It is an arithmetic number, because the mean of its divisors is an integer number (30310566).

Almost surely, 2^121100099 is an apocalyptic number.

121100099 is a deficient number, since it is larger than the sum of its proper divisors (142165).

121100099 is an equidigital number, since it uses as much as digits as its factorization.

121100099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142164.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 121100099 is about 11004.5490139306. The cubic root of 121100099 is about 494.7450974775.

The spelling of 121100099 in words is "one hundred twenty-one million, one hundred thousand, ninety-nine".