11111112222212 has 24 divisors (see below), whose sum is σ = 19807224053400. Its totient is φ = 5452311029760.

The previous prime is 11111112222169. The next prime is 11111112222253. The reversal of 11111112222212 is 21222221111111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 153118820416 + 10957993401796 = 391304^2 + 3310286^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50600183 + ... + 50819294.

It is an arithmetic number, because the mean of its divisors is an integer number (825301002225).

Almost surely, 2^{11111112222212} is an apocalyptic number.

It is an amenable number.

11111112222212 is a deficient number, since it is larger than the sum of its proper divisors (8696111831188).

11111112222212 is a wasteful number, since it uses less digits than its factorization.

11111112222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101419991 (or 101419989 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 11111112222212 its reverse (21222221111111), we get a palindrome (32333333333323).

The spelling of 11111112222212 in words is "eleven trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twelve".