121223443 has 4 divisors (see below), whose sum is σ = 132243768. Its totient is φ = 110203120.

The previous prime is 121223419. The next prime is 121223461. The reversal of 121223443 is 344322121.

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 121223443 - 2⁵ = 121223411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220443) 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, 5510146 + ... + 5510167.

It is an arithmetic number, because the mean of its divisors is an integer number (33060942).

Almost surely, 2^121223443 is an apocalyptic number.

121223443 is a deficient number, since it is larger than the sum of its proper divisors (11020325).

121223443 is a wasteful number, since it uses less digits than its factorization.

121223443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020324.

The product of its digits is 1152, while the sum is 22.

The square root of 121223443 is about 11010.1518154837. The cubic root of 121223443 is about 494.9130112759.

Adding to 121223443 its reverse (344322121), we get a palindrome (465545564).

The spelling of 121223443 in words is "one hundred twenty-one million, two hundred twenty-three thousand, four hundred forty-three".