121182409 has 8 divisors (see below), whose sum is σ = 130069800. Its totient is φ = 112490496.

The previous prime is 121182389. The next prime is 121182419. The reversal of 121182409 is 904281121.

It can be written as a sum of positive squares in 4 ways, for example, as 56025225 + 65157184 = 7485^2 + 8072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121182409 - 2⁹ = 121181897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121182419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47584 + ... + 50065.

It is an arithmetic number, because the mean of its divisors is an integer number (16258725).

Almost surely, 2^121182409 is an apocalyptic number.

It is an amenable number.

121182409 is a deficient number, since it is larger than the sum of its proper divisors (8887391).

121182409 is an equidigital number, since it uses as much as digits as its factorization.

121182409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97739.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 121182409 is about 11008.2881957187. The cubic root of 121182409 is about 494.8571624734.

The spelling of 121182409 in words is "one hundred twenty-one million, one hundred eighty-two thousand, four hundred nine".