11202212221 has 4 divisors (see below), whose sum is σ = 11204273500. Its totient is φ = 11200150944.

The previous prime is 11202212149. The next prime is 11202212233. The reversal of 11202212221 is 12221220211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12221220211 = 83 ⋅147243617.

It can be written as a sum of positive squares in 2 ways, for example, as 4097408121 + 7104804100 = 64011^2 + 84290^2 .

It is a cyclic number.

It is not a de Polignac number, because 11202212221 - 2¹⁹ = 11201687933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202212195 and 11202212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202212821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022466 + ... + 1033363.

It is an arithmetic number, because the mean of its divisors is an integer number (2801068375).

Almost surely, 2^11202212221 is an apocalyptic number.

It is an amenable number.

11202212221 is a deficient number, since it is larger than the sum of its proper divisors (2061279).

11202212221 is an equidigital number, since it uses as much as digits as its factorization.

11202212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061278.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11202212221 its reverse (12221220211), we get a palindrome (23423432432).

The spelling of 11202212221 in words is "eleven billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".