1211162112 has 80 divisors (see below), whose sum is σ = 3585164880.
Its totient is φ = 403716096.
The previous prime is 1211162081. The next prime is 1211162179. The reversal of 1211162112 is 2112611121.
1211162112 is a `hidden beast` number, since 1 + 21 + 11 + 621 + 12 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
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 an insolite number, because it is divisible by the sum (54) and by the product (2304) of the squares of its digits.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29983 + ... + 57630.
It is an arithmetic number, because the mean of its divisors is an integer number (44814561).
Almost surely, 21211162112 is an apocalyptic number.
1211162112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
1211162112 is an abundant number, since it is smaller than the sum of its proper divisors (2374002768).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1211162112 is an frugal number, since it uses more digits than its factorization.
1211162112 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 87640 (or 87618 counting only the distinct ones).
The product of its digits is 48, while the sum is 18.
The square root of 1211162112 is about 34801.7544385337.
The cubic root of 1211162112 is about 1065.9432706265.
Adding to 1211162112 its reverse (2112611121), we get a palindrome (3323773233).
The spelling of 1211162112 in words is "one billion, two hundred eleven million, one hundred sixty-two thousand, one hundred twelve".