12201135440 has 80 divisors (see below), whose sum is σ = 30663204096. Its totient is φ = 4488307200.

The previous prime is 12201135431. The next prime is 12201135481. The reversal of 12201135440 is 4453110221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 260195 + ... + 303485.

Almost surely, 2^12201135440 is an apocalyptic number.

12201135440 is a gapful number since it is divisible by the number (10) 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 12201135440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15331602048).

12201135440 is an abundant number, since it is smaller than the sum of its proper divisors (18462068656).

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

12201135440 is a wasteful number, since it uses less digits than its factorization.

12201135440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43588 (or 43582 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12201135440 its reverse (4453110221), we get a palindrome (16654245661).

The spelling of 12201135440 in words is "twelve billion, two hundred one million, one hundred thirty-five thousand, four hundred forty".