1111111212 has 24 divisors (see below), whose sum is σ = 2593862656. Its totient is φ = 370189008.

The previous prime is 1111111181. The next prime is 1111111213. The reversal of 1111111212 is 2121111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (1111111213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4113 + ... + 47319.

Almost surely, 2^1111111212 is an apocalyptic number.

1111111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111111212 is an abundant number, since it is smaller than the sum of its proper divisors (1482751444).

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

1111111212 is a wasteful number, since it uses less digits than its factorization.

1111111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45357 (or 45355 counting only the distinct ones).

The product of its digits is 4, while the sum is 12.

The square root of 1111111212 is about 33333.3348466666. The cubic root of 1111111212 is about 1035.7441999998.

Adding to 1111111212 its reverse (2121111111), we get a palindrome (3232222323).

It can be divided in two parts, 1111111 and 212, that multiplied together give a palindrome (235555532).

The spelling of 1111111212 in words is "one billion, one hundred eleven million, one hundred eleven thousand, two hundred twelve".