1231178112 has 96 divisors (see below), whose sum is σ = 3729375000. Its totient is φ = 388786176.

The previous prime is 1231178101. The next prime is 1231178141. The reversal of 1231178112 is 2118711321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6237 + ... + 50012.

Almost surely, 2^1231178112 is an apocalyptic number.

1231178112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231178112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1864687500).

1231178112 is an abundant number, since it is smaller than the sum of its proper divisors (2498196888).

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

1231178112 is a wasteful number, since it uses less digits than its factorization.

1231178112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56288 (or 56273 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 1231178112 is about 35088.1477425070. The cubic root of 1231178112 is about 1071.7832412415.

Adding to 1231178112 its reverse (2118711321), we get a palindrome (3349889433).

The spelling of 1231178112 in words is "one billion, two hundred thirty-one million, one hundred seventy-eight thousand, one hundred twelve".