111122121121212 has 12 divisors (see below), whose sum is σ = 259284949282856. Its totient is φ = 37040707040400.

The previous prime is 111122121121183. The next prime is 111122121121213. The reversal of 111122121121212 is 212121121221111.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122121121213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4630088380039 + ... + 4630088380062.

Almost surely, 2^{111122121121212} is an apocalyptic number.

111122121121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111122121121212 is an abundant number, since it is smaller than the sum of its proper divisors (148162828161644).

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

111122121121212 is a wasteful number, since it uses less digits than its factorization.

111122121121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260176760108 (or 9260176760106 counting only the distinct ones).

The product of its digits is 64, while the sum is 21.

Adding to 111122121121212 its reverse (212121121221111), we get a palindrome (323243242342323).

The spelling of 111122121121212 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".