11221311222 has 48 divisors (see below), whose sum is σ = 26637041808. Its totient is φ = 3385789440.

The previous prime is 11221311217. The next prime is 11221311229. The reversal of 11221311222 is 22211312211.

11221311222 is a `hidden beast` number, since 112 + 21 + 311 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11221311195 and 11221311204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221311229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75483 + ... + 167750.

It is an arithmetic number, because the mean of its divisors is an integer number (554938371).

Almost surely, 2^11221311222 is an apocalyptic number.

11221311222 is an abundant number, since it is smaller than the sum of its proper divisors (15415730586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221311222 is a wasteful number, since it uses less digits than its factorization.

11221311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243485 (or 243482 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11221311222 its reverse (22211312211), we get a palindrome (33432623433).

The spelling of 11221311222 in words is "eleven billion, two hundred twenty-one million, three hundred eleven thousand, two hundred twenty-two".