1321330221223 has 4 divisors (see below), whose sum is σ = 1346260980168. Its totient is φ = 1296399462280.

The previous prime is 1321330221199. The next prime is 1321330221319. The reversal of 1321330221223 is 3221220331231.

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-1321330221223 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 (1321330221823) 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, 12465379393 + ... + 12465379498.

It is an arithmetic number, because the mean of its divisors is an integer number (336565245042).

Almost surely, 2^{1321330221223} is an apocalyptic number.

1321330221223 is a deficient number, since it is larger than the sum of its proper divisors (24930758945).

1321330221223 is an equidigital number, since it uses as much as digits as its factorization.

1321330221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24930758944.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1321330221223 its reverse (3221220331231), we get a palindrome (4542550552454).

The spelling of 1321330221223 in words is "one trillion, three hundred twenty-one billion, three hundred thirty million, two hundred twenty-one thousand, two hundred twenty-three".