12205115340 has 96 divisors (see below), whose sum is σ = 38190458880. Its totient is φ = 2886643200.

The previous prime is 12205115311. The next prime is 12205115383. The reversal of 12205115340 is 4351150221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12205115340.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198460 + ... + 252579.

It is an arithmetic number, because the mean of its divisors is an integer number (397817280).

Almost surely, 2^12205115340 is an apocalyptic number.

12205115340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205115340 is an abundant number, since it is smaller than the sum of its proper divisors (25985343540).

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

12205115340 is a wasteful number, since it uses less digits than its factorization.

12205115340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451103 (or 451101 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 12205115340 its reverse (4351150221), we get a palindrome (16556265561).

The spelling of 12205115340 in words is "twelve billion, two hundred five million, one hundred fifteen thousand, three hundred forty".