121616517 has 16 divisors (see below), whose sum is σ = 182998080. Its totient is φ = 71164800.

The previous prime is 121616507. The next prime is 121616531. The reversal of 121616517 is 715616121.

It is not a de Polignac number, because 121616517 - 2⁴ = 121616501 is a prime.

It is a super-2 number, since 2×121616517² = 29581154414422578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121616507) 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, 62584 + ... + 64497.

It is an arithmetic number, because the mean of its divisors is an integer number (11437380).

Almost surely, 2^121616517 is an apocalyptic number.

It is an amenable number.

121616517 is a deficient number, since it is larger than the sum of its proper divisors (61381563).

121616517 is a wasteful number, since it uses less digits than its factorization.

121616517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127124.

The product of its digits is 2520, while the sum is 30.

The square root of 121616517 is about 11027.9878944438. The cubic root of 121616517 is about 495.4473621238.

The spelling of 121616517 in words is "one hundred twenty-one million, six hundred sixteen thousand, five hundred seventeen".