12021322340 has 12 divisors (see below), whose sum is σ = 25244776956. Its totient is φ = 4808528928.

The previous prime is 12021322331. The next prime is 12021322343. The reversal of 12021322340 is 4322312021.

It can be written as a sum of positive squares in 2 ways, for example, as 4579499584 + 7441822756 = 67672^2 + 86266^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 601066117 = 12021322340 / (1 + 2 + 0 + 2 + 1 + 3 + 2 + 2 + 3 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (12021322343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300533039 + ... + 300533078.

It is an arithmetic number, because the mean of its divisors is an integer number (2103731413).

Almost surely, 2^12021322340 is an apocalyptic number.

12021322340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021322340 is an abundant number, since it is smaller than the sum of its proper divisors (13223454616).

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

12021322340 is a wasteful number, since it uses less digits than its factorization.

12021322340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601066126 (or 601066124 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12021322340 its reverse (4322312021), we get a palindrome (16343634361).

The spelling of 12021322340 in words is "twelve billion, twenty-one million, three hundred twenty-two thousand, three hundred forty".