121032609 has 4 divisors (see below), whose sum is σ = 161376816. Its totient is φ = 80688404.

The previous prime is 121032589. The next prime is 121032629. The reversal of 121032609 is 906230121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 906230121 = 3 ⋅302076707.

It is an interprime number because it is at equal distance from previous prime (121032589) and next prime (121032629).

It is a cyclic number.

It is not a de Polignac number, because 121032609 - 2¹¹ = 121030561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121032629) 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, 20172099 + ... + 20172104.

It is an arithmetic number, because the mean of its divisors is an integer number (40344204).

Almost surely, 2^121032609 is an apocalyptic number.

It is an amenable number.

121032609 is a deficient number, since it is larger than the sum of its proper divisors (40344207).

121032609 is an equidigital number, since it uses as much as digits as its factorization.

121032609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40344206.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 121032609 is about 11001.4821274227. The cubic root of 121032609 is about 494.6531720050.

The spelling of 121032609 in words is "one hundred twenty-one million, thirty-two thousand, six hundred nine".