121355151 has 4 divisors (see below), whose sum is σ = 161806872. Its totient is φ = 80903432.

The previous prime is 121355141. The next prime is 121355161. The reversal of 121355151 is 151553121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121355141) and next prime (121355161).

It is a cyclic number.

It is not a de Polignac number, because 121355151 - 2¹⁷ = 121224079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20225856 + ... + 20225861.

It is an arithmetic number, because the mean of its divisors is an integer number (40451718).

Almost surely, 2^121355151 is an apocalyptic number.

121355151 is a deficient number, since it is larger than the sum of its proper divisors (40451721).

121355151 is an equidigital number, since it uses as much as digits as its factorization.

121355151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40451720.

The product of its digits is 750, while the sum is 24.

The square root of 121355151 is about 11016.1313989985. The cubic root of 121355151 is about 495.0921856673.

The spelling of 121355151 in words is "one hundred twenty-one million, three hundred fifty-five thousand, one hundred fifty-one".