11212202210221 has 4 divisors (see below), whose sum is σ = 11212210845792. Its totient is φ = 11212193574652.

The previous prime is 11212202210207. The next prime is 11212202210239. The reversal of 11212202210221 is 12201220221211.

11212202210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11212202210221 - 2⁵ = 11212202210189 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 (11212202240221) 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, 1930105 + ... + 5113678.

It is an arithmetic number, because the mean of its divisors is an integer number (2803052711448).

Almost surely, 2^{11212202210221} is an apocalyptic number.

It is an amenable number.

11212202210221 is a deficient number, since it is larger than the sum of its proper divisors (8635571).

11212202210221 is an equidigital number, since it uses as much as digits as its factorization.

11212202210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8635570.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11212202210221 its reverse (12201220221211), we get a palindrome (23413422431432).

The spelling of 11212202210221 in words is "eleven trillion, two hundred twelve billion, two hundred two million, two hundred ten thousand, two hundred twenty-one".