1223112312 has 96 divisors (see below), whose sum is σ = 3444320880. Its totient is φ = 406632960.

The previous prime is 1223112301. The next prime is 1223112313. The reversal of 1223112312 is 2132113221.

1223112312 is a `hidden beast` number, since 122 + 311 + 231 + 2 = 666.

1223112312 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223112313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1152262 + ... + 1153322.

Almost surely, 2^1223112312 is an apocalyptic number.

1223112312 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 1223112312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722160440).

1223112312 is an abundant number, since it is smaller than the sum of its proper divisors (2221208568).

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

1223112312 is a wasteful number, since it uses less digits than its factorization.

1223112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1659 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1223112312 is about 34973.0226317372. The cubic root of 1223112312 is about 1069.4375918845.

Adding to 1223112312 its reverse (2132113221), we get a palindrome (3355225533).

Subtracting 1223112312 from its reverse (2132113221), we obtain a palindrome (909000909).

The spelling of 1223112312 in words is "one billion, two hundred twenty-three million, one hundred twelve thousand, three hundred twelve".