1323120123 has 16 divisors (see below), whose sum is σ = 2110961440. Its totient is φ = 814227552.

The previous prime is 1323120067. The next prime is 1323120133. The reversal of 1323120123 is 3210213231.

It is not a de Polignac number, because 1323120123 - 2⁶ = 1323120059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323120096 and 1323120105.

It is not an unprimeable number, because it can be changed into a prime (1323120133) 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, 1884436 + ... + 1885137.

It is an arithmetic number, because the mean of its divisors is an integer number (131935090).

Almost surely, 2^1323120123 is an apocalyptic number.

1323120123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1323120123 is a deficient number, since it is larger than the sum of its proper divisors (787841317).

1323120123 is a wasteful number, since it uses less digits than its factorization.

1323120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769595 (or 3769589 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1323120123 is about 36374.7181844753. The cubic root of 1323120123 is about 1097.8249370036.

Adding to 1323120123 its reverse (3210213231), we get a palindrome (4533333354).

The spelling of 1323120123 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, one hundred twenty-three".