11431321104 has 80 divisors (see below), whose sum is σ = 33762124800. Its totient is φ = 3264881280.

The previous prime is 11431321081. The next prime is 11431321117. The reversal of 11431321104 is 40112313411.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309747 + ... + 1318445.

It is an arithmetic number, because the mean of its divisors is an integer number (422026560).

Almost surely, 2^11431321104 is an apocalyptic number.

11431321104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11431321104 is an abundant number, since it is smaller than the sum of its proper divisors (22330803696).

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

11431321104 is a wasteful number, since it uses less digits than its factorization.

11431321104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12628 (or 12622 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11431321104 its reverse (40112313411), we get a palindrome (51543634515).

The spelling of 11431321104 in words is "eleven billion, four hundred thirty-one million, three hundred twenty-one thousand, one hundred four".