12222222212 has 12 divisors (see below), whose sum is σ = 21396277056. Its totient is φ = 6109000200.

The previous prime is 12222222197. The next prime is 12222222253. The reversal of 12222222212 is 21222222221.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514664 + ... + 537887.

It is an arithmetic number, because the mean of its divisors is an integer number (1783023088).

Almost surely, 2^12222222212 is an apocalyptic number.

It is an amenable number.

12222222212 is a deficient number, since it is larger than the sum of its proper divisors (9174054844).

12222222212 is a wasteful number, since it uses less digits than its factorization.

12222222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055458 (or 1055456 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

Adding to 12222222212 its reverse (21222222221), we get a palindrome (33444444433).

Subtracting 12222222212 from its reverse (21222222221), we obtain a palindrome (9000000009).

It can be divided in two parts, 1222222221 and 2, that multiplied together give a palindrome (2444444442).

The spelling of 12222222212 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".