12222144012 has 48 divisors (see below), whose sum is σ = 30744064512. Its totient is φ = 3756740160.

The previous prime is 12222143987. The next prime is 12222144013. The reversal of 12222144012 is 21044122221.

It is a super-2 number, since 2×12222144012² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12222144012.

It is not an unprimeable number, because it can be changed into a prime (12222144013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111133 + ... + 191819.

It is an arithmetic number, because the mean of its divisors is an integer number (640501344).

Almost surely, 2^12222144012 is an apocalyptic number.

12222144012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222144012 is an abundant number, since it is smaller than the sum of its proper divisors (18521920500).

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

12222144012 is a wasteful number, since it uses less digits than its factorization.

12222144012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81678 (or 81676 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12222144012 its reverse (21044122221), we get a palindrome (33266266233).

The spelling of 12222144012 in words is "twelve billion, two hundred twenty-two million, one hundred forty-four thousand, twelve".