1321313223 has 16 divisors (see below), whose sum is σ = 1839271680. Its totient is φ = 842153664.

The previous prime is 1321313197. The next prime is 1321313243. The reversal of 1321313223 is 3223131231.

It is not a de Polignac number, because 1321313223 - 2¹² = 1321309127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321313223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321313243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191115 + ... + 197907.

It is an arithmetic number, because the mean of its divisors is an integer number (114954480).

Almost surely, 2^1321313223 is an apocalyptic number.

1321313223 is a deficient number, since it is larger than the sum of its proper divisors (517958457).

1321313223 is a wasteful number, since it uses less digits than its factorization.

1321313223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9638.

The product of its digits is 648, while the sum is 21.

The square root of 1321313223 is about 36349.8723931735. The cubic root of 1321313223 is about 1097.3249663874.

Adding to 1321313223 its reverse (3223131231), we get a palindrome (4544444454).

The spelling of 1321313223 in words is "one billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-three".