20120021203200 has 216 divisors, whose sum is σ = 66451382006016. Its totient is φ = 5361208320000.

The previous prime is 20120021203169. The next prime is 20120021203253. The reversal of 20120021203200 is 230212002102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20120021203200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24576465 + ... + 25381935.

Almost surely, 2^{20120021203200} is an apocalyptic number.

20120021203200 is a gapful number since it is divisible by the number (20) 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 20120021203200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33225691003008).

20120021203200 is an abundant number, since it is smaller than the sum of its proper divisors (46331360802816).

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

20120021203200 is a wasteful number, since it uses less digits than its factorization.

20120021203200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806801 (or 806782 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20120021203200 its reverse (230212002102), we get a palindrome (20350233205302).

The spelling of 20120021203200 in words is "twenty trillion, one hundred twenty billion, twenty-one million, two hundred three thousand, two hundred".