1213331112 has 48 divisors (see below), whose sum is σ = 3755550240. Its totient is φ = 346665888.

The previous prime is 1213331107. The next prime is 1213331113. The reversal of 1213331112 is 2111333121.

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 not an unprimeable number, because it can be changed into a prime (1213331113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1203198 + ... + 1204205.

It is an arithmetic number, because the mean of its divisors is an integer number (78240630).

Almost surely, 2^1213331112 is an apocalyptic number.

1213331112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213331112 is an abundant number, since it is smaller than the sum of its proper divisors (2542219128).

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

1213331112 is a wasteful number, since it uses less digits than its factorization.

1213331112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407422 (or 2407415 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1213331112 is about 34832.9027214213. The cubic root of 1213331112 is about 1066.5792031583.

Adding to 1213331112 its reverse (2111333121), we get a palindrome (3324664233).

The spelling of 1213331112 in words is "one billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred twelve".