1121331312 has 30 divisors (see below), whose sum is σ = 3138170672. Its totient is φ = 373777056.

The previous prime is 1121331269. The next prime is 1121331317. The reversal of 1121331312 is 2131331211.

1121331312 is a `hidden beast` number, since 1 + 1 + 21 + 331 + 312 = 666.

It is a super-2 number, since 2×1121331312² = 2514767822543282688, which contains 22 as substring.

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 (1121331317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3893368 + ... + 3893655.

Almost surely, 2^1121331312 is an apocalyptic number.

1121331312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121331312 is an abundant number, since it is smaller than the sum of its proper divisors (2016839360).

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

1121331312 is a wasteful number, since it uses less digits than its factorization.

1121331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787037 (or 7787028 counting only the distinct ones).

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

The square root of 1121331312 is about 33486.2854315017. The cubic root of 1121331312 is about 1038.9101353992.

Adding to 1121331312 its reverse (2131331211), we get a palindrome (3252662523).

The spelling of 1121331312 in words is "one billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred twelve".