12222022212 has 18 divisors (see below), whose sum is σ = 30894556238. Its totient is φ = 4074007392.

The previous prime is 12222022207. The next prime is 12222022231. The reversal of 12222022212 is 21222022221.

It can be written as a sum of positive squares in only one way, i.e., 6460301376 + 5761720836 = 80376^2 + 75906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169750273 + ... + 169750344.

Almost surely, 2^12222022212 is an apocalyptic number.

12222022212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222022212 is an abundant number, since it is smaller than the sum of its proper divisors (18672534026).

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

12222022212 is a wasteful number, since it uses less digits than its factorization.

12222022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339500627 (or 339500622 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12222022212 its reverse (21222022221), we get a palindrome (33444044433).

Subtracting 12222022212 from its reverse (21222022221), we obtain a palindrome (9000000009).

The spelling of 12222022212 in words is "twelve billion, two hundred twenty-two million, twenty-two thousand, two hundred twelve".