121217117 has 16 divisors (see below), whose sum is σ = 140931840. Its totient is φ = 102117888.

The previous prime is 121217113. The next prime is 121217141. The reversal of 121217117 is 711712121.

It is a cyclic number.

It is not a de Polignac number, because 121217117 - 2² = 121217113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121217092 and 121217101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121217111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112859 + ... + 113927.

It is an arithmetic number, because the mean of its divisors is an integer number (8808240).

Almost surely, 2^121217117 is an apocalyptic number.

It is an amenable number.

121217117 is a deficient number, since it is larger than the sum of its proper divisors (19714723).

121217117 is a wasteful number, since it uses less digits than its factorization.

121217117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its digits is 196, while the sum is 23.

The square root of 121217117 is about 11009.8645314100. The cubic root of 121217117 is about 494.9044021760.

Adding to 121217117 its reverse (711712121), we get a palindrome (832929238).

The spelling of 121217117 in words is "one hundred twenty-one million, two hundred seventeen thousand, one hundred seventeen".