121604231 has 6 divisors (see below), whose sum is σ = 141458040. Its totient is φ = 104232156.

The previous prime is 121604201. The next prime is 121604233. The reversal of 121604231 is 132406121.

It is not a de Polignac number, because 121604231 - 2⁶ = 121604167 is a prime.

It is a super-2 number, since 2×121604231² = 29575177994202722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121604233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1240811 + ... + 1240908.

It is an arithmetic number, because the mean of its divisors is an integer number (23576340).

Almost surely, 2^121604231 is an apocalyptic number.

121604231 is a deficient number, since it is larger than the sum of its proper divisors (19853809).

121604231 is an equidigital number, since it uses as much as digits as its factorization.

121604231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481733 (or 2481726 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 121604231 is about 11027.4308431293. The cubic root of 121604231 is about 495.4306777911.

The spelling of 121604231 in words is "one hundred twenty-one million, six hundred four thousand, two hundred thirty-one".