121091215 has 8 divisors (see below), whose sum is σ = 166068000. Its totient is φ = 83033952.

The previous prime is 121091213. The next prime is 121091227. The reversal of 121091215 is 512190121.

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 121091215 - 2¹ = 121091213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121091213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1729840 + ... + 1729909.

It is an arithmetic number, because the mean of its divisors is an integer number (20758500).

Almost surely, 2^121091215 is an apocalyptic number.

121091215 is a deficient number, since it is larger than the sum of its proper divisors (44976785).

121091215 is an equidigital number, since it uses as much as digits as its factorization.

121091215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459761.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 121091215 is about 11004.1453552741. The cubic root of 121091215 is about 494.7329988831.

The spelling of 121091215 in words is "one hundred twenty-one million, ninety-one thousand, two hundred fifteen".