20021021010200 has 384 divisors, whose sum is σ = 54489913315200. Its totient is φ = 6699228856320.

The previous prime is 20021021010191. The next prime is 20021021010223. The reversal of 20021021010200 is 201012012002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15532211156 + ... + 15532212444.

It is an arithmetic number, because the mean of its divisors is an integer number (141900815925).

Almost surely, 2^{20021021010200} is an apocalyptic number.

20021021010200 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 20021021010200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27244956657600).

20021021010200 is an abundant number, since it is smaller than the sum of its proper divisors (34468892305000).

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

20021021010200 is a wasteful number, since it uses less digits than its factorization.

20021021010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2302 counting only the distinct ones).

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

Adding to 20021021010200 its reverse (201012012002), we get a palindrome (20222033022202).

The spelling of 20021021010200 in words is "twenty trillion, twenty-one billion, twenty-one million, ten thousand, two hundred".