11103321321 has 40 divisors (see below), whose sum is σ = 17439899400. Its totient is φ = 7029711360.

The previous prime is 11103321293. The next prime is 11103321349. The reversal of 11103321321 is 12312330111.

11103321321 is a `hidden beast` number, since 1 + 1 + 10 + 332 + 1 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (11103321293) and next prime (11103321349).

It can be written as a sum of positive squares in 4 ways, for example, as 583947225 + 10519374096 = 24165^2 + 102564^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11103321321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11103321294 and 11103321303.

It is not an unprimeable number, because it can be changed into a prime (11103321371) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104545 + ... + 182033.

It is an arithmetic number, because the mean of its divisors is an integer number (435997485).

Almost surely, 2^11103321321 is an apocalyptic number.

It is an amenable number.

11103321321 is a deficient number, since it is larger than the sum of its proper divisors (6336578079).

11103321321 is an equidigital number, since it uses as much as digits as its factorization.

11103321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77591 (or 77582 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11103321321 its reverse (12312330111), we get a palindrome (23415651432).

The spelling of 11103321321 in words is "eleven billion, one hundred three million, three hundred twenty-one thousand, three hundred twenty-one".