11211313233221 has 4 divisors (see below), whose sum is σ = 11212093490700. Its totient is φ = 11210532975744.

The previous prime is 11211313233209. The next prime is 11211313233251. The reversal of 11211313233221 is 12233231311211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4544950708321 + 6666362524900 = 2131889^2 + 2581930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211313233221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211313233251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390107186 + ... + 390135923.

It is an arithmetic number, because the mean of its divisors is an integer number (2803023372675).

Almost surely, 2^{11211313233221} is an apocalyptic number.

It is an amenable number.

11211313233221 is a deficient number, since it is larger than the sum of its proper divisors (780257479).

11211313233221 is an equidigital number, since it uses as much as digits as its factorization.

11211313233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780257478.

The product of its digits is 1296, while the sum is 26.

Adding to 11211313233221 its reverse (12233231311211), we get a palindrome (23444544544432).

The spelling of 11211313233221 in words is "eleven trillion, two hundred eleven billion, three hundred thirteen million, two hundred thirty-three thousand, two hundred twenty-one".