1321322023 has 4 divisors (see below), whose sum is σ = 1510082320. Its totient is φ = 1132561728.

The previous prime is 1321321993. The next prime is 1321322033. The reversal of 1321322023 is 3202231231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321322023 - 2⁹ = 1321321511 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 (1321322033) 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, 94380138 + ... + 94380151.

It is an arithmetic number, because the mean of its divisors is an integer number (377520580).

Almost surely, 2^1321322023 is an apocalyptic number.

1321322023 is a deficient number, since it is larger than the sum of its proper divisors (188760297).

1321322023 is an equidigital number, since it uses as much as digits as its factorization.

1321322023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188760296.

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

The square root of 1321322023 is about 36349.9934387890. The cubic root of 1321322023 is about 1097.3274024583.

Adding to 1321322023 its reverse (3202231231), we get a palindrome (4523553254).

The spelling of 1321322023 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, twenty-three".