12111222212212 has 12 divisors (see below), whose sum is σ = 21251460962116. Its totient is φ = 6039376223040.

The previous prime is 12111222212207. The next prime is 12111222212213. The reversal of 12111222212212 is 21221222211121.

It can be written as a sum of positive squares in 2 ways, for example, as 10232551754896 + 1878670457316 = 3198836^2 + 1370646^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111222212213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058719089 + ... + 4058722072.

Almost surely, 2^{12111222212212} is an apocalyptic number.

It is an amenable number.

12111222212212 is a deficient number, since it is larger than the sum of its proper divisors (9140238749904).

12111222212212 is a wasteful number, since it uses less digits than its factorization.

12111222212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117441538 (or 8117441536 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 12111222212212 its reverse (21221222211121), we get a palindrome (33332444423333).

The spelling of 12111222212212 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twelve".