1321113003 has 16 divisors (see below), whose sum is σ = 2014711296. Its totient is φ = 754326720.

The previous prime is 1321112953. The next prime is 1321113049. The reversal of 1321113003 is 3003111231.

It is not a de Polignac number, because 1321113003 - 2⁸ = 1321112747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321112003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3223 + ... + 51503.

It is an arithmetic number, because the mean of its divisors is an integer number (125919456).

Almost surely, 2^1321113003 is an apocalyptic number.

1321113003 is a deficient number, since it is larger than the sum of its proper divisors (693598293).

1321113003 is a wasteful number, since it uses less digits than its factorization.

1321113003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49594.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1321113003 is about 36347.1182213941. The cubic root of 1321113003 is about 1097.2695373139.

Adding to 1321113003 its reverse (3003111231), we get a palindrome (4324224234).

The spelling of 1321113003 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, three".