1321012303 has 8 divisors (see below), whose sum is σ = 1430578800. Its totient is φ = 1212581568.

The previous prime is 1321012283. The next prime is 1321012349. The reversal of 1321012303 is 3032101231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321012303 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 (1321012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281518 + ... + 286171.

It is an arithmetic number, because the mean of its divisors is an integer number (178822350).

Almost surely, 2^1321012303 is an apocalyptic number.

1321012303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321012303 is a deficient number, since it is larger than the sum of its proper divisors (109566497).

1321012303 is a wasteful number, since it uses less digits than its factorization.

1321012303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567881.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321012303 is about 36345.7329407456. The cubic root of 1321012303 is about 1097.2416573244.

Adding to 1321012303 its reverse (3032101231), we get a palindrome (4353113534).

The spelling of 1321012303 in words is "one billion, three hundred twenty-one million, twelve thousand, three hundred three".