11111111222012 has 12 divisors (see below), whose sum is σ = 19918699386096. Its totient is φ = 5420054254560.

The previous prime is 11111111221997. The next prime is 11111111222069. The reversal of 11111111222012 is 21022211111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33875338928 + ... + 33875339255.

It is an arithmetic number, because the mean of its divisors is an integer number (1659891615508).

Almost surely, 2^{11111111222012} is an apocalyptic number.

It is an amenable number.

11111111222012 is a deficient number, since it is larger than the sum of its proper divisors (8807588164084).

11111111222012 is a wasteful number, since it uses less digits than its factorization.

11111111222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67750678228 (or 67750678226 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11111111222012 its reverse (21022211111111), we get a palindrome (32133322333123).

The spelling of 11111111222012 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, twelve".