12222121212212 has 24 divisors (see below), whose sum is σ = 22355065130496. Its totient is φ = 5835826627488.

The previous prime is 12222121212157. The next prime is 12222121212239. The reversal of 12222121212212 is 21221212122221.

It is a Harshad number since it is a multiple of its sum of digits (23).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108303428 + ... + 108416219.

It is an arithmetic number, because the mean of its divisors is an integer number (931461047104).

Almost surely, 2^{12222121212212} is an apocalyptic number.

It is an amenable number.

12222121212212 is a deficient number, since it is larger than the sum of its proper divisors (10132943918284).

12222121212212 is a wasteful number, since it uses less digits than its factorization.

12222121212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216720287 (or 216720285 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

Adding to 12222121212212 its reverse (21221212122221), we get a palindrome (33443333334433).

The spelling of 12222121212212 in words is "twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".