201212231112 has 64 divisors (see below), whose sum is σ = 562943976000. Its totient is φ = 66588210432.

The previous prime is 201212231083. The next prime is 201212231117. The reversal of 201212231112 is 211132212102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201212231117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3320833 + ... + 3380880.

It is an arithmetic number, because the mean of its divisors is an integer number (8795999625).

Almost surely, 2^201212231112 is an apocalyptic number.

It is an amenable number.

201212231112 is an abundant number, since it is smaller than the sum of its proper divisors (361731744888).

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

201212231112 is a wasteful number, since it uses less digits than its factorization.

201212231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701867 (or 6701857 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201212231112 its reverse (211132212102), we get a palindrome (412344443214).

The spelling of 201212231112 in words is "two hundred one billion, two hundred twelve million, two hundred thirty-one thousand, one hundred twelve".