121100222209 has 4 divisors (see below), whose sum is σ = 123385132116. Its totient is φ = 118815312304.

The previous prime is 121100222183. The next prime is 121100222213. The reversal of 121100222209 is 902222001121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44670090609 + 76430131600 = 211353^2 + 276460^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100222209 - 2¹¹ = 121100220161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121100222209.

It is not an unprimeable number, because it can be changed into a prime (121100220209) 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, 1142454874 + ... + 1142454979.

It is an arithmetic number, because the mean of its divisors is an integer number (30846283029).

Almost surely, 2^121100222209 is an apocalyptic number.

It is an amenable number.

121100222209 is a deficient number, since it is larger than the sum of its proper divisors (2284909907).

121100222209 is an equidigital number, since it uses as much as digits as its factorization.

121100222209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284909906.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 121100222209 in words is "one hundred twenty-one billion, one hundred million, two hundred twenty-two thousand, two hundred nine".