11222220212221 has 4 divisors (see below), whose sum is σ = 11389716036352. Its totient is φ = 11054724388092.

The previous prime is 11222220212209. The next prime is 11222220212227. The reversal of 11222220212221 is 12221202222211.

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.

It is a cyclic number.

It is not a de Polignac number, because 11222220212221 - 2³⁹ = 10672464398333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222220212192 and 11222220212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222220212227) 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, 83747911965 + ... + 83747912098.

It is an arithmetic number, because the mean of its divisors is an integer number (2847429009088).

Almost surely, 2^{11222220212221} is an apocalyptic number.

It is an amenable number.

11222220212221 is a deficient number, since it is larger than the sum of its proper divisors (167495824131).

11222220212221 is an equidigital number, since it uses as much as digits as its factorization.

11222220212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167495824130.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 11222220212221 its reverse (12221202222211), we get a palindrome (23443422434432).

The spelling of 11222220212221 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".