121412443 has 4 divisors (see below), whose sum is σ = 121443840. Its totient is φ = 121381048.

The previous prime is 121412437. The next prime is 121412449. The reversal of 121412443 is 344214121.

It is a happy number.

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 (121412437) and next prime (121412449).

It is a cyclic number.

It is not a de Polignac number, because 121412443 - 2⁵ = 121412411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121412449) 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, 8923 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (30360960).

Almost surely, 2^121412443 is an apocalyptic number.

121412443 is a deficient number, since it is larger than the sum of its proper divisors (31397).

121412443 is an equidigital number, since it uses as much as digits as its factorization.

121412443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31396.

The product of its digits is 768, while the sum is 22.

The square root of 121412443 is about 11018.7314605630. The cubic root of 121412443 is about 495.1700847339.

Adding to 121412443 its reverse (344214121), we get a palindrome (465626564).

The spelling of 121412443 in words is "one hundred twenty-one million, four hundred twelve thousand, four hundred forty-three".