121413243 has 16 divisors (see below), whose sum is σ = 190012160. Its totient is φ = 67503456.

The previous prime is 121413233. The next prime is 121413277. The reversal of 121413243 is 342314121.

It is not a de Polignac number, because 121413243 - 2¹⁰ = 121412219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121413203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77353 + ... + 78906.

It is an arithmetic number, because the mean of its divisors is an integer number (11875760).

Almost surely, 2^121413243 is an apocalyptic number.

121413243 is a deficient number, since it is larger than the sum of its proper divisors (68598917).

121413243 is a wasteful number, since it uses less digits than its factorization.

121413243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156306.

The product of its digits is 576, while the sum is 21.

The square root of 121413243 is about 11018.7677623226. The cubic root of 121413243 is about 495.1711723083.

Adding to 121413243 its reverse (342314121), we get a palindrome (463727364).

The spelling of 121413243 in words is "one hundred twenty-one million, four hundred thirteen thousand, two hundred forty-three".