121031409 has 8 divisors (see below), whose sum is σ = 166580992. Its totient is φ = 78084720.

The previous prime is 121031399. The next prime is 121031429. The reversal of 121031409 is 904130121.

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

It is not a de Polignac number, because 121031409 - 2²³ = 112642801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121031429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650614 + ... + 650799.

It is an arithmetic number, because the mean of its divisors is an integer number (20822624).

Almost surely, 2^121031409 is an apocalyptic number.

It is an amenable number.

121031409 is a deficient number, since it is larger than the sum of its proper divisors (45549583).

121031409 is a wasteful number, since it uses less digits than its factorization.

121031409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301447.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 121031409 is about 11001.4275891813. The cubic root of 121031409 is about 494.6515372231.

The spelling of 121031409 in words is "one hundred twenty-one million, thirty-one thousand, four hundred nine".