1320123223 has 2 divisors, whose sum is σ = 1320123224. Its totient is φ = 1320123222.

The previous prime is 1320123209. The next prime is 1320123229. The reversal of 1320123223 is 3223210231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320123223 - 2²⁵ = 1286568791 is a prime.

It is the 36334-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320123223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320123229) by changing a digit.

It is a nontrivial repunit in base 36333.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660061611 + 660061612.

It is an arithmetic number, because the mean of its divisors is an integer number (660061612).

Almost surely, 2^1320123223 is an apocalyptic number.

1320123223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320123223 is an equidigital number, since it uses as much as digits as its factorization.

1320123223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1320123223 is about 36333.5000103211. The cubic root of 1320123223 is about 1096.9954434809.

Adding to 1320123223 its reverse (3223210231), we get a palindrome (4543333454).

The spelling of 1320123223 in words is "one billion, three hundred twenty million, one hundred twenty-three thousand, two hundred twenty-three".