12220212222 has 24 divisors (see below), whose sum is σ = 27192725976. Its totient is φ = 3963311856.

The previous prime is 12220212217. The next prime is 12220212229. The reversal of 12220212222 is 22221202221.

12220212222 is a `hidden beast` number, since 12 + 220 + 212 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 12220212195 and 12220212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220212229) 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 11 ways as a sum of consecutive naturals, for example, 9173668 + ... + 9174999.

It is an arithmetic number, because the mean of its divisors is an integer number (1133030249).

Almost surely, 2^12220212222 is an apocalyptic number.

12220212222 is an abundant number, since it is smaller than the sum of its proper divisors (14972513754).

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

12220212222 is a wasteful number, since it uses less digits than its factorization.

12220212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18348712 (or 18348709 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12220212222 its reverse (22221202221), we get a palindrome (34441414443).

The spelling of 12220212222 in words is "twelve billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-two".