11031331203221 has 12 divisors (see below), whose sum is σ = 12845499382188. Its totient is φ = 9445748683392.

The previous prime is 11031331203199. The next prime is 11031331203241. The reversal of 11031331203221 is 12230213313011.

It can be written as a sum of positive squares in 2 ways, for example, as 9697338543025 + 1333992660196 = 3114055^2 + 1154986^2 .

It is not a de Polignac number, because 11031331203221 - 2⁶ = 11031331203157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031331203241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115166666 + ... + 115262411.

It is an arithmetic number, because the mean of its divisors is an integer number (1070458281849).

Almost surely, 2^{11031331203221} is an apocalyptic number.

It is an amenable number.

11031331203221 is a deficient number, since it is larger than the sum of its proper divisors (1814168178967).

11031331203221 is an equidigital number, since it uses as much as digits as its factorization.

11031331203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230430068 (or 230430061 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 11031331203221 its reverse (12230213313011), we get a palindrome (23261544516232).

The spelling of 11031331203221 in words is "eleven trillion, thirty-one billion, three hundred thirty-one million, two hundred three thousand, two hundred twenty-one".