12222222222 has 16 divisors (see below), whose sum is σ = 27936508032. Its totient is φ = 3492063480.

The previous prime is 12222222197. The next prime is 12222222253. The reversal of 12222222222 is 22222222221.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

12222222222 is a modest number, since divided by 222222 gives 12222 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145502604 + ... + 145502687.

It is an arithmetic number, because the mean of its divisors is an integer number (1746031752).

Almost surely, 2^12222222222 is an apocalyptic number.

12222222222 is an abundant number, since it is smaller than the sum of its proper divisors (15714285810).

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

12222222222 is a wasteful number, since it uses less digits than its factorization.

12222222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291005303.

The product of its digits is 1024, while the sum is 21.

Adding to 12222222222 its reverse (22222222221), we get a palindrome (34444444443).

Subtracting 12222222222 from its reverse (22222222221), we obtain a palindrome (9999999999).

The spelling of 12222222222 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".