1223131112 has 32 divisors (see below), whose sum is σ = 2623008000. Its totient is φ = 523796544.

The previous prime is 1223131081. The next prime is 1223131127. The reversal of 1223131112 is 2111313221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72014 + ... + 87362.

It is an arithmetic number, because the mean of its divisors is an integer number (81969000).

Almost surely, 2^1223131112 is an apocalyptic number.

It is an amenable number.

1223131112 is an abundant number, since it is smaller than the sum of its proper divisors (1399876888).

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

1223131112 is a wasteful number, since it uses less digits than its factorization.

1223131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785 (or 16781 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1223131112 is about 34973.2914093026. The cubic root of 1223131112 is about 1069.4430711643.

Adding to 1223131112 its reverse (2111313221), we get a palindrome (3334444333).

The spelling of 1223131112 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, one hundred twelve".