1321133103 has 12 divisors (see below), whose sum is σ = 1909284000. Its totient is φ = 880302816.

The previous prime is 1321133101. The next prime is 1321133123. The reversal of 1321133103 is 3013311231.

It is a happy number.

It is not a de Polignac number, because 1321133103 - 2¹ = 1321133101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321133101) 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 11 ways as a sum of consecutive naturals, for example, 18726 + ... + 54707.

It is an arithmetic number, because the mean of its divisors is an integer number (159107000).

Almost surely, 2^1321133103 is an apocalyptic number.

1321133103 is a deficient number, since it is larger than the sum of its proper divisors (588150897).

1321133103 is a wasteful number, since it uses less digits than its factorization.

1321133103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75438 (or 75435 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1321133103 is about 36347.3947209425. The cubic root of 1321133103 is about 1097.2751020677.

Adding to 1321133103 its reverse (3013311231), we get a palindrome (4334444334).

The spelling of 1321133103 in words is "one billion, three hundred twenty-one million, one hundred thirty-three thousand, one hundred three".