1321131003 has 8 divisors (see below), whose sum is σ = 1782731328. Its totient is φ = 870142344.

The previous prime is 1321131001. The next prime is 1321131023. The reversal of 1321131003 is 3001311231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321131003 - 2¹ = 1321131001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321131001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2652625 + ... + 2653122.

It is an arithmetic number, because the mean of its divisors is an integer number (222841416).

Almost surely, 2^1321131003 is an apocalyptic number.

1321131003 is a deficient number, since it is larger than the sum of its proper divisors (461600325).

1321131003 is an equidigital number, since it uses as much as digits as its factorization.

1321131003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305833.

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

The square root of 1321131003 is about 36347.3658330284. The cubic root of 1321131003 is about 1097.2745206781.

Adding to 1321131003 its reverse (3001311231), we get a palindrome (4322442234).

The spelling of 1321131003 in words is "one billion, three hundred twenty-one million, one hundred thirty-one thousand, three".