11111111222212 has 96 divisors (see below), whose sum is σ = 20467987513344. Its totient is φ = 5271133190400.

The previous prime is 11111111222191. The next prime is 11111111222219. The reversal of 11111111222212 is 21222211111111.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11111111222212.

It is not an unprimeable number, because it can be changed into a prime (11111111222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1808740413 + ... + 1808746555.

It is an arithmetic number, because the mean of its divisors is an integer number (213208203264).

Almost surely, 2^{11111111222212} is an apocalyptic number.

It is an amenable number.

11111111222212 is a deficient number, since it is larger than the sum of its proper divisors (9356876291132).

11111111222212 is a wasteful number, since it uses less digits than its factorization.

11111111222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409 (or 7407 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 11111111222212 its reverse (21222211111111), we get a palindrome (32333322333323).

The spelling of 11111111222212 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twelve".