1220223423 has 4 divisors (see below), whose sum is σ = 1626964568. Its totient is φ = 813482280.

The previous prime is 1220223391. The next prime is 1220223437. The reversal of 1220223423 is 3243220221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3243220221 = 3 ⋅1081073407.

It is not a de Polignac number, because 1220223423 - 2⁵ = 1220223391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220223423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220223223) 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, 203370568 + ... + 203370573.

It is an arithmetic number, because the mean of its divisors is an integer number (406741142).

Almost surely, 2^1220223423 is an apocalyptic number.

1220223423 is a deficient number, since it is larger than the sum of its proper divisors (406741145).

1220223423 is an equidigital number, since it uses as much as digits as its factorization.

1220223423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406741144.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1220223423 is about 34931.6965376719. The cubic root of 1220223423 is about 1068.5949540685.

Adding to 1220223423 its reverse (3243220221), we get a palindrome (4463443644).

The spelling of 1220223423 in words is "one billion, two hundred twenty million, two hundred twenty-three thousand, four hundred twenty-three".