121918153 has 8 divisors (see below), whose sum is σ = 140114880. Its totient is φ = 103916400.

The previous prime is 121918129. The next prime is 121918157. The reversal of 121918153 is 351819121.

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

It is not a de Polignac number, because 121918153 - 2²⁵ = 88363721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121918157) 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, 47398 + ... + 49903.

It is an arithmetic number, because the mean of its divisors is an integer number (17514360).

Almost surely, 2^121918153 is an apocalyptic number.

It is an amenable number.

121918153 is a deficient number, since it is larger than the sum of its proper divisors (18196727).

121918153 is an equidigital number, since it uses as much as digits as its factorization.

121918153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97487.

The product of its digits is 2160, while the sum is 31.

The square root of 121918153 is about 11041.6553559690. The cubic root of 121918153 is about 495.8566304866.

The spelling of 121918153 in words is "one hundred twenty-one million, nine hundred eighteen thousand, one hundred fifty-three".