11222211222 has 24 divisors (see below), whose sum is σ = 24971948976. Its totient is φ = 3639635856.

The previous prime is 11222211199. The next prime is 11222211239. The reversal of 11222211222 is 22211222211.

It is a happy number.

11222211222 is a `hidden beast` number, since 11 + 222 + 211 + 222 = 666.

It is a super-2 number, since 2×11222211222² (a number of 21 digits) contains 22 as substring.

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 zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 11222211195 and 11222211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8424418 + ... + 8425749.

It is an arithmetic number, because the mean of its divisors is an integer number (1040497874).

Almost surely, 2^11222211222 is an apocalyptic number.

11222211222 is an abundant number, since it is smaller than the sum of its proper divisors (13749737754).

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

11222211222 is a wasteful number, since it uses less digits than its factorization.

11222211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16850212 (or 16850209 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 11222211222 its reverse (22211222211), we get a palindrome (33433433433).

The spelling of 11222211222 in words is "eleven billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".