1223312123 has 16 divisors (see below), whose sum is σ = 1358834400. Its totient is φ = 1092026880.

The previous prime is 1223312119. The next prime is 1223312137. The reversal of 1223312123 is 3212133221.

It is a cyclic number.

It is not a de Polignac number, because 1223312123 - 2² = 1223312119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223312095 and 1223312104.

It is not an unprimeable number, because it can be changed into a prime (1223312143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130973 + ... + 140001.

It is an arithmetic number, because the mean of its divisors is an integer number (84927150).

Almost surely, 2^1223312123 is an apocalyptic number.

1223312123 is a deficient number, since it is larger than the sum of its proper divisors (135522277).

1223312123 is a wasteful number, since it uses less digits than its factorization.

1223312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262.

The product of its digits is 432, while the sum is 20.

The square root of 1223312123 is about 34975.8791597867. The cubic root of 1223312123 is about 1069.4958241383.

Adding to 1223312123 its reverse (3212133221), we get a palindrome (4435445344).

The spelling of 1223312123 in words is "one billion, two hundred twenty-three million, three hundred twelve thousand, one hundred twenty-three".