11103120321 has 16 divisors (see below), whose sum is σ = 15210336000. Its totient is φ = 7199152128.

The previous prime is 11103120319. The next prime is 11103120331. The reversal of 11103120321 is 12302130111.

It is a happy number.

It is not a de Polignac number, because 11103120321 - 2¹ = 11103120319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11103120321.

It is not an unprimeable number, because it can be changed into a prime (11103120331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279880 + ... + 317078.

It is an arithmetic number, because the mean of its divisors is an integer number (950646000).

Almost surely, 2^11103120321 is an apocalyptic number.

It is an amenable number.

11103120321 is a deficient number, since it is larger than the sum of its proper divisors (4107215679).

11103120321 is a wasteful number, since it uses less digits than its factorization.

11103120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39928.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11103120321 its reverse (12302130111), we get a palindrome (23405250432).

The spelling of 11103120321 in words is "eleven billion, one hundred three million, one hundred twenty thousand, three hundred twenty-one".