1131112212 has 12 divisors (see below), whose sum is σ = 2639261856. Its totient is φ = 377037400.

The previous prime is 1131112189. The next prime is 1131112261. The reversal of 1131112212 is 2122111311.

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

It is a super-2 number, since 2×1131112212² = 2558829672271065888, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1131112191 and 1131112200.

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, 47129664 + ... + 47129687.

It is an arithmetic number, because the mean of its divisors is an integer number (219938488).

Almost surely, 2^1131112212 is an apocalyptic number.

1131112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131112212 is an abundant number, since it is smaller than the sum of its proper divisors (1508149644).

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

1131112212 is a wasteful number, since it uses less digits than its factorization.

1131112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94259358 (or 94259356 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 1131112212 is about 33632.0117150313. The cubic root of 1131112212 is about 1041.9220533523.

Adding to 1131112212 its reverse (2122111311), we get a palindrome (3253223523).

Subtracting 1131112212 from its reverse (2122111311), we obtain a palindrome (990999099).

The spelling of 1131112212 in words is "one billion, one hundred thirty-one million, one hundred twelve thousand, two hundred twelve".