111112111221212 has 48 divisors (see below), whose sum is σ = 214151944258560. Its totient is φ = 50208732560448.

The previous prime is 111112111221197. The next prime is 111112111221229. The reversal of 111112111221212 is 212122111211111.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84556148 + ... + 85860155.

It is an arithmetic number, because the mean of its divisors is an integer number (4461498838720).

Almost surely, 2^{111112111221212} is an apocalyptic number.

It is an amenable number.

111112111221212 is a deficient number, since it is larger than the sum of its proper divisors (103039833037348).

111112111221212 is a wasteful number, since it uses less digits than its factorization.

111112111221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170416722 (or 170416720 counting only the distinct ones).

The product of its digits is 32, while the sum is 20.

Adding to 111112111221212 its reverse (212122111211111), we get a palindrome (323234222432323).

The spelling of 111112111221212 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".