1323121207 has 4 divisors (see below), whose sum is σ = 1380648240. Its totient is φ = 1265594176.

The previous prime is 1323121193. The next prime is 1323121213. The reversal of 1323121207 is 7021213231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323121207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323121907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28763482 + ... + 28763527.

It is an arithmetic number, because the mean of its divisors is an integer number (345162060).

Almost surely, 2^1323121207 is an apocalyptic number.

1323121207 is a deficient number, since it is larger than the sum of its proper divisors (57527033).

1323121207 is an equidigital number, since it uses as much as digits as its factorization.

1323121207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57527032.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1323121207 is about 36374.7330849314. The cubic root of 1323121207 is about 1097.8252368106.

Adding to 1323121207 its reverse (7021213231), we get a palindrome (8344334438).

The spelling of 1323121207 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred seven".