1321113103 has 4 divisors (see below), whose sum is σ = 1321740448. Its totient is φ = 1320485760.

The previous prime is 1321113097. The next prime is 1321113107. The reversal of 1321113103 is 3013111231.

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 1321113103 - 2⁵ = 1321113071 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 (1321113107) 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, 310503 + ... + 314728.

It is an arithmetic number, because the mean of its divisors is an integer number (330435112).

Almost surely, 2^1321113103 is an apocalyptic number.

1321113103 is a deficient number, since it is larger than the sum of its proper divisors (627345).

1321113103 is an equidigital number, since it uses as much as digits as its factorization.

1321113103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627344.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1321113103 is about 36347.1195970190. The cubic root of 1321113103 is about 1097.2695649994.

Adding to 1321113103 its reverse (3013111231), we get a palindrome (4334224334).

The spelling of 1321113103 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, one hundred three".