121445151 has 4 divisors (see below), whose sum is σ = 161926872. Its totient is φ = 80963432.

The previous prime is 121445143. The next prime is 121445167. The reversal of 121445151 is 151544121.

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

It is a cyclic number.

It is not a de Polignac number, because 121445151 - 2³ = 121445143 is a prime.

It is a super-3 number, since 3×121445151³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121445111) 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 3 ways as a sum of consecutive naturals, for example, 20240856 + ... + 20240861.

It is an arithmetic number, because the mean of its divisors is an integer number (40481718).

Almost surely, 2^121445151 is an apocalyptic number.

121445151 is a deficient number, since it is larger than the sum of its proper divisors (40481721).

121445151 is an equidigital number, since it uses as much as digits as its factorization.

121445151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40481720.

The product of its digits is 800, while the sum is 24.

The square root of 121445151 is about 11020.2155605052. The cubic root of 121445151 is about 495.2145463189.

Adding to 121445151 its reverse (151544121), we get a palindrome (272989272).

The spelling of 121445151 in words is "one hundred twenty-one million, four hundred forty-five thousand, one hundred fifty-one".