11013220321 has 4 divisors (see below), whose sum is σ = 11014354944. Its totient is φ = 11012085700.

The previous prime is 11013220319. The next prime is 11013220357. The reversal of 11013220321 is 12302231011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11013220321 - 2¹ = 11013220319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11013220295 and 11013220304.

It is not an unprimeable number, because it can be changed into a prime (11013920321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552625 + ... + 572206.

It is an arithmetic number, because the mean of its divisors is an integer number (2753588736).

Almost surely, 2^11013220321 is an apocalyptic number.

It is an amenable number.

11013220321 is a deficient number, since it is larger than the sum of its proper divisors (1134623).

11013220321 is an equidigital number, since it uses as much as digits as its factorization.

11013220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134622.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11013220321 its reverse (12302231011), we get a palindrome (23315451332).

The spelling of 11013220321 in words is "eleven billion, thirteen million, two hundred twenty thousand, three hundred twenty-one".