111111112101212 has 12 divisors (see below), whose sum is σ = 202898552532816. Its totient is φ = 53140097091840.

The previous prime is 111111112101163. The next prime is 111111112101307. The reversal of 111111112101212 is 212101211111111.

It is a happy number.

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, 603864739589 + ... + 603864739772.

It is an arithmetic number, because the mean of its divisors is an integer number (16908212711068).

Almost surely, 2^{111111112101212} is an apocalyptic number.

It is an amenable number.

111111112101212 is a deficient number, since it is larger than the sum of its proper divisors (91787440431604).

111111112101212 is a wasteful number, since it uses less digits than its factorization.

111111112101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207729479388 (or 1207729479386 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111111112101212 its reverse (212101211111111), we get a palindrome (323212323212323).

The spelling of 111111112101212 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twelve million, one hundred one thousand, two hundred twelve".