12221000222 has 24 divisors (see below), whose sum is σ = 20498181240. Its totient is φ = 5448366720.

The previous prime is 12221000219. The next prime is 12221000291. The reversal of 12221000222 is 22200012221.

It is a super-2 number, since 2×12221000222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221000197 and 12221000206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545429 + ... + 567392.

It is an arithmetic number, because the mean of its divisors is an integer number (854090885).

Almost surely, 2^12221000222 is an apocalyptic number.

12221000222 is a deficient number, since it is larger than the sum of its proper divisors (8277181018).

12221000222 is a wasteful number, since it uses less digits than its factorization.

12221000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112876 (or 1112859 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12221000222 its reverse (22200012221), we get a palindrome (34421012443).

The spelling of 12221000222 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-two", and thus it is an aban number.