12021321440000 has 90 divisors (see below), whose sum is σ = 29985007866660. Its totient is φ = 4808528512000.

The previous prime is 12021321439997. The next prime is 12021321440021. The reversal of 12021321440000 is 4412312021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37406630 + ... + 37726629.

It is an arithmetic number, because the mean of its divisors is an integer number (333166754074).

Almost surely, 2^{12021321440000} is an apocalyptic number.

12021321440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021321440000 is an abundant number, since it is smaller than the sum of its proper divisors (17963686426660).

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

12021321440000 is an frugal number, since it uses more digits than its factorization.

12021321440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75133295 (or 75133266 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12021321440000 its reverse (4412312021), we get a palindrome (12025733752021).

The spelling of 12021321440000 in words is "twelve trillion, twenty-one billion, three hundred twenty-one million, four hundred forty thousand".