12222222220 has 48 divisors (see below), whose sum is σ = 27679474368. Its totient is φ = 4506543360.

The previous prime is 12222222197. The next prime is 12222222253. The reversal of 12222222220 is 2222222221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156690 + ... + 221350.

It is an arithmetic number, because the mean of its divisors is an integer number (576655716).

Almost surely, 2^12222222220 is an apocalyptic number.

12222222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222222220 is an abundant number, since it is smaller than the sum of its proper divisors (15457252148).

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

12222222220 is a wasteful number, since it uses less digits than its factorization.

12222222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65410 (or 65408 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 12222222220 its reverse (2222222221), we get a palindrome (14444444441).

Subtracting from 12222222220 its reverse (2222222221), we obtain a palindrome (9999999999).

The spelling of 12222222220 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".