121164409 has 4 divisors (see below), whose sum is σ = 121322740. Its totient is φ = 121006080.

The previous prime is 121164401. The next prime is 121164467. The reversal of 121164409 is 904461121.

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 52606009 + 68558400 = 7253^2 + 8280^2 .

It is a cyclic number.

It is not a de Polignac number, because 121164409 - 2³ = 121164401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121164401) 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, 78012 + ... + 79549.

It is an arithmetic number, because the mean of its divisors is an integer number (30330685).

Almost surely, 2^121164409 is an apocalyptic number.

It is an amenable number.

121164409 is a deficient number, since it is larger than the sum of its proper divisors (158331).

121164409 is an equidigital number, since it uses as much as digits as its factorization.

121164409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158330.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 121164409 is about 11007.4705995519. The cubic root of 121164409 is about 494.8326598247.

The spelling of 121164409 in words is "one hundred twenty-one million, one hundred sixty-four thousand, four hundred nine".