121255617 has 32 divisors (see below), whose sum is σ = 189829120. Its totient is φ = 67417920.

The previous prime is 121255597. The next prime is 121255621. The reversal of 121255617 is 716552121.

It is not a de Polignac number, because 121255617 - 2⁷ = 121255489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121255627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131484 + ... + 132402.

It is an arithmetic number, because the mean of its divisors is an integer number (5932160).

Almost surely, 2^121255617 is an apocalyptic number.

It is an amenable number.

121255617 is a deficient number, since it is larger than the sum of its proper divisors (68573503).

121255617 is a wasteful number, since it uses less digits than its factorization.

121255617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093.

The product of its digits is 4200, while the sum is 30.

The square root of 121255617 is about 11011.6128246502. The cubic root of 121255617 is about 494.9567924739.

The spelling of 121255617 in words is "one hundred twenty-one million, two hundred fifty-five thousand, six hundred seventeen".