201021120020000 has 240 divisors, whose sum is σ = 565278454141632. Its totient is φ = 68910860160000.

The previous prime is 201021120019997. The next prime is 201021120020009. The reversal of 201021120020000 is 20021120102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (201021120020009) 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, 932432219 + ... + 932647781.

Almost surely, 2^{201021120020000} is an apocalyptic number.

201021120020000 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 201021120020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282639227070816).

201021120020000 is an abundant number, since it is smaller than the sum of its proper divisors (364257334121632).

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

201021120020000 is an equidigital number, since it uses as much as digits as its factorization.

201021120020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222261 (or 222238 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201021120020000 its reverse (20021120102), we get a palindrome (201041141140102).

The spelling of 201021120020000 in words is "two hundred one trillion, twenty-one billion, one hundred twenty million, twenty thousand".