1223220123 has 20 divisors (see below), whose sum is σ = 1831930320. Its totient is φ = 813404592.

The previous prime is 1223220107. The next prime is 1223220151. The reversal of 1223220123 is 3210223221.

It is not a de Polignac number, because 1223220123 - 2⁴ = 1223220107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223220096 and 1223220105.

It is not an unprimeable number, because it can be changed into a prime (1223210123) 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 19 ways as a sum of consecutive naturals, for example, 13138 + ... + 51176.

It is an arithmetic number, because the mean of its divisors is an integer number (91596516).

Almost surely, 2^1223220123 is an apocalyptic number.

1223220123 is a deficient number, since it is larger than the sum of its proper divisors (608710197).

1223220123 is an equidigital number, since it uses as much as digits as its factorization.

1223220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38448 (or 38439 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1223220123 is about 34974.5639429572. The cubic root of 1223220123 is about 1069.4690127517.

Adding to 1223220123 its reverse (3210223221), we get a palindrome (4433443344).

The spelling of 1223220123 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, one hundred twenty-three".