121138617 has 8 divisors (see below), whose sum is σ = 171019296. Its totient is φ = 76008512.

The previous prime is 121138571. The next prime is 121138637. The reversal of 121138617 is 716831121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121138617 - 2⁷ = 121138489 is a prime.

It is a super-3 number, since 3×121138617³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121138637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187583 + ... + 1187684.

It is an arithmetic number, because the mean of its divisors is an integer number (21377412).

Almost surely, 2^121138617 is an apocalyptic number.

121138617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

121138617 is a deficient number, since it is larger than the sum of its proper divisors (49880679).

121138617 is a wasteful number, since it uses less digits than its factorization.

121138617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375287.

The product of its digits is 2016, while the sum is 30.

The square root of 121138617 is about 11006.2989692267. The cubic root of 121138617 is about 494.7975460214.

Adding to 121138617 its reverse (716831121), we get a palindrome (837969738).

The spelling of 121138617 in words is "one hundred twenty-one million, one hundred thirty-eight thousand, six hundred seventeen".