20021220120000 has 280 divisors, whose sum is σ = 72212541489792. Its totient is φ = 4853628800000.

The previous prime is 20021220119983. The next prime is 20021220120001. The reversal of 20021220120000 is 2102212002.

20021220120000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021220120001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6263796 + ... + 8903795.

Almost surely, 2^{20021220120000} is an apocalyptic number.

20021220120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021220120000 is an abundant number, since it is smaller than the sum of its proper divisors (52191321369792).

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

20021220120000 is a wasteful number, since it uses less digits than its factorization.

20021220120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167637 (or 15167612 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021220120000 its reverse (2102212002), we get a palindrome (20023322332002).

The spelling of 20021220120000 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred twenty thousand".