11331122202221 has 2 divisors, whose sum is σ = 11331122202222. Its totient is φ = 11331122202220.

The previous prime is 11331122202139. The next prime is 11331122202319. The reversal of 11331122202221 is 12220222113311.

11331122202221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10194521008996 + 1136601193225 = 3192886^2 + 1066115^2 .

It is an emirp because it is prime and its reverse (12220222113311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331122202221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331122202721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665561101110 + 5665561101111.

It is an arithmetic number, because the mean of its divisors is an integer number (5665561101111).

Almost surely, 2^{11331122202221} is an apocalyptic number.

It is an amenable number.

11331122202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331122202221 is an equidigital number, since it uses as much as digits as its factorization.

11331122202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 11331122202221 its reverse (12220222113311), we get a palindrome (23551344315532).

It can be divided in two parts, 1133112 and 2202221, that added together give a palindrome (3335333).

The spelling of 11331122202221 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".