10003321391 has 16 divisors (see below), whose sum is σ = 11998416384. Its totient is φ = 8154050784.

The previous prime is 10003321337. The next prime is 10003321403. The reversal of 10003321391 is 19312330001.

10003321391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10003321391 - 2²² = 9999127087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003321091) 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 15 ways as a sum of consecutive naturals, for example, 151721 + ... + 207426.

It is an arithmetic number, because the mean of its divisors is an integer number (749901024).

Almost surely, 2^10003321391 is an apocalyptic number.

10003321391 is a deficient number, since it is larger than the sum of its proper divisors (1995094993).

10003321391 is a wasteful number, since it uses less digits than its factorization.

10003321391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359350.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 10003321391 its reverse (19312330001), we get a palindrome (29315651392).

The spelling of 10003321391 in words is "ten billion, three million, three hundred twenty-one thousand, three hundred ninety-one".