121435151 has 4 divisors (see below), whose sum is σ = 125622600. Its totient is φ = 117247704.

The previous prime is 121435121. The next prime is 121435207. The reversal of 121435151 is 151534121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151534121 = 3779 ⋅40099.

It is a cyclic number.

It is not a de Polignac number, because 121435151 - 2¹⁸ = 121173007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121435121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093681 + ... + 2093738.

It is an arithmetic number, because the mean of its divisors is an integer number (31405650).

Almost surely, 2^121435151 is an apocalyptic number.

121435151 is a deficient number, since it is larger than the sum of its proper divisors (4187449).

121435151 is an equidigital number, since it uses as much as digits as its factorization.

121435151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187448.

The product of its digits is 600, while the sum is 23.

The square root of 121435151 is about 11019.7618395317. The cubic root of 121435151 is about 495.2009536769.

Adding to 121435151 its reverse (151534121), we get a palindrome (272969272).

The spelling of 121435151 in words is "one hundred twenty-one million, four hundred thirty-five thousand, one hundred fifty-one".