11221100321 has 4 divisors (see below), whose sum is σ = 11708974272. Its totient is φ = 10733226372.

The previous prime is 11221100309. The next prime is 11221100323. The reversal of 11221100321 is 12300112211.

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 11221100321 - 2¹⁸ = 11220838177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221100296 and 11221100305.

It is not an unprimeable number, because it can be changed into a prime (11221100323) 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, 243936941 + ... + 243936986.

It is an arithmetic number, because the mean of its divisors is an integer number (2927243568).

Almost surely, 2^11221100321 is an apocalyptic number.

It is an amenable number.

11221100321 is a deficient number, since it is larger than the sum of its proper divisors (487873951).

11221100321 is an equidigital number, since it uses as much as digits as its factorization.

11221100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487873950.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11221100321 its reverse (12300112211), we get a palindrome (23521212532).

The spelling of 11221100321 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, three hundred twenty-one".