121117215 has 8 divisors (see below), whose sum is σ = 193787568. Its totient is φ = 64595840.

The previous prime is 121117193. The next prime is 121117219. The reversal of 121117215 is 512711121.

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

It is not a de Polignac number, because 121117215 - 2¹¹ = 121115167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121117191 and 121117200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121117219) 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, 4037226 + ... + 4037255.

It is an arithmetic number, because the mean of its divisors is an integer number (24223446).

Almost surely, 2^121117215 is an apocalyptic number.

121117215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121117215 is a deficient number, since it is larger than the sum of its proper divisors (72670353).

121117215 is an equidigital number, since it uses as much as digits as its factorization.

121117215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8074489.

The product of its digits is 140, while the sum is 21.

The square root of 121117215 is about 11005.3266648473. The cubic root of 121117215 is about 494.7684050779.

Adding to 121117215 its reverse (512711121), we get a palindrome (633828336).

The spelling of 121117215 in words is "one hundred twenty-one million, one hundred seventeen thousand, two hundred fifteen".