1321131112 has 16 divisors (see below), whose sum is σ = 2830995360. Its totient is φ = 566199024.

The previous prime is 1321131103. The next prime is 1321131143. The reversal of 1321131112 is 2111311231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11795758 + ... + 11795869.

It is an arithmetic number, because the mean of its divisors is an integer number (176937210).

Almost surely, 2^1321131112 is an apocalyptic number.

It is an amenable number.

1321131112 is an abundant number, since it is smaller than the sum of its proper divisors (1509864248).

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

1321131112 is a wasteful number, since it uses less digits than its factorization.

1321131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23591640 (or 23591636 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1321131112 is about 36347.3673324493. The cubic root of 1321131112 is about 1097.2745508550.

Adding to 1321131112 its reverse (2111311231), we get a palindrome (3432442343).

It can be divided in two parts, 132113 and 1112, that added together give a square (133225 = 365²).

The spelling of 1321131112 in words is "one billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred twelve".