111111100001212 has 12 divisors (see below), whose sum is σ = 194449654934136. Its totient is φ = 55554055734320.

The previous prime is 111111100001201. The next prime is 111111100001243. The reversal of 111111100001212 is 212100001111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111100001192 and 111111100001201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373399258 + ... + 373696705.

It is an arithmetic number, because the mean of its divisors is an integer number (16204137911178).

Almost surely, 2^{111111100001212} is an apocalyptic number.

It is an amenable number.

111111100001212 is a deficient number, since it is larger than the sum of its proper divisors (83338554932924).

111111100001212 is a wasteful number, since it uses less digits than its factorization.

111111100001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747133148 (or 747133146 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111111100001212 its reverse (212100001111111), we get a palindrome (323211101112323).

The spelling of 111111100001212 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, one thousand, two hundred twelve".