1321320210233 has 32 divisors (see below), whose sum is σ = 1445276558880. Its totient is φ = 1203308789760.

The previous prime is 1321320210191. The next prime is 1321320210257. The reversal of 1321320210233 is 3320120231231.

It can be written as a sum of positive squares in 16 ways, for example, as 210935362729 + 1110384847504 = 459277^2 + 1053748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321320210233 - 2⁶ = 1321320210169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321320210199 and 1321320210208.

It is not an unprimeable number, because it can be changed into a prime (1321320210293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18145385 + ... + 18218057.

It is an arithmetic number, because the mean of its divisors is an integer number (45164892465).

Almost surely, 2^{1321320210233} is an apocalyptic number.

It is an amenable number.

1321320210233 is a deficient number, since it is larger than the sum of its proper divisors (123956348647).

1321320210233 is a wasteful number, since it uses less digits than its factorization.

1321320210233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73037.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1321320210233 its reverse (3320120231231), we get a palindrome (4641440441464).

The spelling of 1321320210233 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, two hundred ten thousand, two hundred thirty-three".