121211099 has 4 divisors (see below), whose sum is σ = 121820400. Its totient is φ = 120601800.

The previous prime is 121211063. The next prime is 121211113. The reversal of 121211099 is 990112121.

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

It is a cyclic number.

It is not a de Polignac number, because 121211099 - 2²⁴ = 104433883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304352 + ... + 304749.

It is an arithmetic number, because the mean of its divisors is an integer number (30455100).

Almost surely, 2^121211099 is an apocalyptic number.

121211099 is a deficient number, since it is larger than the sum of its proper divisors (609301).

121211099 is an equidigital number, since it uses as much as digits as its factorization.

121211099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609300.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 121211099 is about 11009.5912276524. The cubic root of 121211099 is about 494.8962119576.

The spelling of 121211099 in words is "one hundred twenty-one million, two hundred eleven thousand, ninety-nine".