1331213112 has 96 divisors (see below), whose sum is σ = 3818505600. Its totient is φ = 417794112.

The previous prime is 1331213089. The next prime is 1331213153. The reversal of 1331213112 is 2113121331.

1331213112 is a `hidden beast` number, since 1 + 331 + 21 + 311 + 2 = 666.

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225543 + ... + 231369.

It is an arithmetic number, because the mean of its divisors is an integer number (39776100).

Almost surely, 2^1331213112 is an apocalyptic number.

1331213112 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 1331213112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909252800).

1331213112 is an abundant number, since it is smaller than the sum of its proper divisors (2487292488).

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

1331213112 is a wasteful number, since it uses less digits than its factorization.

1331213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025 (or 6018 counting only the distinct ones).

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

The square root of 1331213112 is about 36485.7932899917. The cubic root of 1331213112 is about 1100.0587054069.

Adding to 1331213112 its reverse (2113121331), we get a palindrome (3444334443).

The spelling of 1331213112 in words is "one billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred twelve".