1323120129 has 4 divisors (see below), whose sum is σ = 1764160176. Its totient is φ = 882080084.

The previous prime is 1323120067. The next prime is 1323120133. The reversal of 1323120129 is 9210213231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1323120129 - 2¹¹ = 1323118081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1323120099 and 1323120108.

It is not an unprimeable number, because it can be changed into a prime (1323120199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220520019 + ... + 220520024.

It is an arithmetic number, because the mean of its divisors is an integer number (441040044).

Almost surely, 2^1323120129 is an apocalyptic number.

It is an amenable number.

1323120129 is a deficient number, since it is larger than the sum of its proper divisors (441040047).

1323120129 is an equidigital number, since it uses as much as digits as its factorization.

1323120129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441040046.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1323120129 is about 36374.7182669502. The cubic root of 1323120129 is about 1097.8249386631.

The spelling of 1323120129 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, one hundred twenty-nine".