11031221303221 has 16 divisors (see below), whose sum is σ = 13178522583040. Its totient is φ = 9034494945840.

The previous prime is 11031221303197. The next prime is 11031221303227. The reversal of 11031221303221 is 12230312213011.

It is not a de Polignac number, because 11031221303221 - 2⁹ = 11031221302709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11031221303192 and 11031221303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031221303227) 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, 321724131 + ... + 321758416.

It is an arithmetic number, because the mean of its divisors is an integer number (823657661440).

Almost surely, 2^{11031221303221} is an apocalyptic number.

It is an amenable number.

11031221303221 is a deficient number, since it is larger than the sum of its proper divisors (2147301279819).

11031221303221 is an equidigital number, since it uses as much as digits as its factorization.

11031221303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643482664.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 11031221303221 its reverse (12230312213011), we get a palindrome (23261533516232).

The spelling of 11031221303221 in words is "eleven trillion, thirty-one billion, two hundred twenty-one million, three hundred three thousand, two hundred twenty-one".