1231211112 has 32 divisors (see below), whose sum is σ = 3161220000. Its totient is φ = 399311424.

The previous prime is 1231211087. The next prime is 1231211119. The reversal of 1231211112 is 2111121321.

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 a junction number, because it is equal to n+sod(n) for n = 1231211091 and 1231211100.

It is not an unprimeable number, because it can be changed into a prime (1231211119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692362 + ... + 694137.

It is an arithmetic number, because the mean of its divisors is an integer number (98788125).

Almost surely, 2^1231211112 is an apocalyptic number.

1231211112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231211112 is an abundant number, since it is smaller than the sum of its proper divisors (1930008888).

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

1231211112 is a wasteful number, since it uses less digits than its factorization.

1231211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386545 (or 1386541 counting only the distinct ones).

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

The square root of 1231211112 is about 35088.6179836140. The cubic root of 1231211112 is about 1071.7928170374.

Adding to 1231211112 its reverse (2111121321), we get a palindrome (3342332433).

The spelling of 1231211112 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, one hundred twelve".