1231230112 has 96 divisors (see below), whose sum is σ = 2903185152. Its totient is φ = 502554624.

The previous prime is 1231230071. The next prime is 1231230139. The reversal of 1231230112 is 2110321321.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1818318 + ... + 1818994.

It is an arithmetic number, because the mean of its divisors is an integer number (30241512).

Almost surely, 2^1231230112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231230112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451592576).

1231230112 is an abundant number, since it is smaller than the sum of its proper divisors (1671955040).

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

1231230112 is a wasteful number, since it uses less digits than its factorization.

1231230112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231230112 is about 35088.8887256351. Note that the first 3 decimals coincide. The cubic root of 1231230112 is about 1071.7983302968.

Adding to 1231230112 its reverse (2110321321), we get a palindrome (3341551433).

It can be divided in two parts, 12312 and 30112, that added together give a palindrome (42424).

The spelling of 1231230112 in words is "one billion, two hundred thirty-one million, two hundred thirty thousand, one hundred twelve".