121844817 has 12 divisors (see below), whose sum is σ = 182516880. Its totient is φ = 81229716.

The previous prime is 121844813. The next prime is 121844837. The reversal of 121844817 is 718448121.

It is not a de Polignac number, because 121844817 - 2² = 121844813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121844813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250467 + ... + 250952.

It is an arithmetic number, because the mean of its divisors is an integer number (15209740).

Almost surely, 2^121844817 is an apocalyptic number.

It is an amenable number.

121844817 is a deficient number, since it is larger than the sum of its proper divisors (60672063).

121844817 is an frugal number, since it uses more digits than its factorization.

121844817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501434 (or 501422 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 121844817 is about 11038.3339775530. Note that the first 3 decimals coincide. The cubic root of 121844817 is about 495.7571882662.

The spelling of 121844817 in words is "one hundred twenty-one million, eight hundred forty-four thousand, eight hundred seventeen".