111212101221112 has 16 divisors (see below), whose sum is σ = 217588893693840. Its totient is φ = 53188396236096.

The previous prime is 111212101221083. The next prime is 111212101221187. The reversal of 111212101221112 is 211122101212111.

It is a super-2 number, since 2×111212101221112² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111212101221112.

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, 302206796613 + ... + 302206796980.

It is an arithmetic number, because the mean of its divisors is an integer number (13599305855865).

Almost surely, 2^{111212101221112} is an apocalyptic number.

It is an amenable number.

111212101221112 is a deficient number, since it is larger than the sum of its proper divisors (106376792472728).

111212101221112 is a wasteful number, since it uses less digits than its factorization.

111212101221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604413593622 (or 604413593618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111212101221112 its reverse (211122101212111), we get a palindrome (322334202433223).

Subtracting 111212101221112 from its reverse (211122101212111), we obtain a palindrome (99909999990999).

The spelling of 111212101221112 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred twelve".