11112211120212 has 72 divisors (see below), whose sum is σ = 29075520854016. Its totient is φ = 3575582668224.

The previous prime is 11112211120211. The next prime is 11112211120217. The reversal of 11112211120212 is 21202111221111.

It is a happy number.

11112211120212 is a `hidden beast` number, since 1 + 111 + 221 + 1 + 120 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112211120211) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 32675328 + ... + 33013655.

It is an arithmetic number, because the mean of its divisors is an integer number (403826678528).

Almost surely, 2^{11112211120212} is an apocalyptic number.

11112211120212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11112211120212 is an abundant number, since it is smaller than the sum of its proper divisors (17963309733804).

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

11112211120212 is a wasteful number, since it uses less digits than its factorization.

11112211120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65689157 (or 65689152 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112211120212 its reverse (21202111221111), we get a palindrome (32314322341323).

The spelling of 11112211120212 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, one hundred twenty thousand, two hundred twelve".