121122109 has 4 divisors (see below), whose sum is σ = 121332604. Its totient is φ = 120911616.

The previous prime is 121122107. The next prime is 121122139. The reversal of 121122109 is 901221121.

It is a happy number.

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 62062884 + 59059225 = 7878^2 + 7685^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122109 - 2¹ = 121122107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122107) 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, 104382 + ... + 105535.

It is an arithmetic number, because the mean of its divisors is an integer number (30333151).

Almost surely, 2^121122109 is an apocalyptic number.

It is an amenable number.

121122109 is a deficient number, since it is larger than the sum of its proper divisors (210495).

121122109 is an equidigital number, since it uses as much as digits as its factorization.

121122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210494.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121122109 is about 11005.5490094770. The cubic root of 121122109 is about 494.7750690465.

The spelling of 121122109 in words is "one hundred twenty-one million, one hundred twenty-two thousand, one hundred nine".