11122202221 has 4 divisors (see below), whose sum is σ = 11977756252. Its totient is φ = 10266648192.

The previous prime is 11122202219. The next prime is 11122202243. The reversal of 11122202221 is 12220222111.

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: 12220222111 = 104173 ⋅117307.

It can be written as a sum of positive squares in 2 ways, for example, as 5473928196 + 5648274025 = 73986^2 + 75155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122202221 - 2¹ = 11122202219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122202195 and 11122202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122202261) 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, 427776996 + ... + 427777021.

It is an arithmetic number, because the mean of its divisors is an integer number (2994439063).

Almost surely, 2^11122202221 is an apocalyptic number.

It is an amenable number.

11122202221 is a deficient number, since it is larger than the sum of its proper divisors (855554031).

11122202221 is an equidigital number, since it uses as much as digits as its factorization.

11122202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855554030.

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

Adding to 11122202221 its reverse (12220222111), we get a palindrome (23342424332).

It can be divided in two parts, 11 and 122202221, that multiplied together give a palindrome (1344224431).

The spelling of 11122202221 in words is "eleven billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".