1223220023 has 4 divisors (see below), whose sum is σ = 1295174160. Its totient is φ = 1151265888.

The previous prime is 1223219999. The next prime is 1223220043. The reversal of 1223220023 is 3200223221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3200223221 = 13 ⋅246171017.

It is a cyclic number.

It is not a de Polignac number, because 1223220023 - 2¹² = 1223215927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 71954119 = 1223220023 / (1 + 2 + 2 + 3 + 2 + 2 + 0 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223219983 and 1223220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223220043) 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, 35977043 + ... + 35977076.

It is an arithmetic number, because the mean of its divisors is an integer number (323793540).

Almost surely, 2^1223220023 is an apocalyptic number.

1223220023 is a deficient number, since it is larger than the sum of its proper divisors (71954137).

1223220023 is an equidigital number, since it uses as much as digits as its factorization.

1223220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71954136.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1223220023 is about 34974.5625133468. The cubic root of 1223220023 is about 1069.4689836082.

Adding to 1223220023 its reverse (3200223221), we get a palindrome (4423443244).

The spelling of 1223220023 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, twenty-three".