1223421143 has 4 divisors (see below), whose sum is σ = 1398195600. Its totient is φ = 1048646688.

The previous prime is 1223421137. The next prime is 1223421161. The reversal of 1223421143 is 3411243221.

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 1223421143 - 2⁴ = 1223421127 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 (1223441143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87387218 + ... + 87387231.

It is an arithmetic number, because the mean of its divisors is an integer number (349548900).

Almost surely, 2^1223421143 is an apocalyptic number.

1223421143 is a deficient number, since it is larger than the sum of its proper divisors (174774457).

1223421143 is an equidigital number, since it uses as much as digits as its factorization.

1223421143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174774456.

The product of its digits is 1152, while the sum is 23.

The square root of 1223421143 is about 34977.4376277051. The cubic root of 1223421143 is about 1069.5275938911.

Adding to 1223421143 its reverse (3411243221), we get a palindrome (4634664364).

The spelling of 1223421143 in words is "one billion, two hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-three".