111101212212 has 24 divisors (see below), whose sum is σ = 260668410912. Its totient is φ = 36829130400.

The previous prime is 111101212193. The next prime is 111101212217. The reversal of 111101212212 is 212212101111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111101212191 and 111101212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101212217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25573614 + ... + 25577957.

It is an arithmetic number, because the mean of its divisors is an integer number (10861183788).

Almost surely, 2^111101212212 is an apocalyptic number.

111101212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111101212212 is an abundant number, since it is smaller than the sum of its proper divisors (149567198700).

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

111101212212 is a wasteful number, since it uses less digits than its factorization.

111101212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51151759 (or 51151757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111101212212 its reverse (212212101111), we get a palindrome (323313313323).

The spelling of 111101212212 in words is "one hundred eleven billion, one hundred one million, two hundred twelve thousand, two hundred twelve".