20001021002200 has 96 divisors (see below), whose sum is σ = 54016809176160. Its totient is φ = 6745074969600.

The previous prime is 20001021002191. The next prime is 20001021002273. The reversal of 20001021002200 is 220012010002.

It is a super-2 number, since 2×20001021002200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117016597 + ... + 117187396.

It is an arithmetic number, because the mean of its divisors is an integer number (562675095585).

Almost surely, 2^{20001021002200} is an apocalyptic number.

20001021002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001021002200 is an abundant number, since it is smaller than the sum of its proper divisors (34015788173960).

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

20001021002200 is a wasteful number, since it uses less digits than its factorization.

20001021002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234204077 (or 234204068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20001021002200 its reverse (220012010002), we get a palindrome (20221033012202).

The spelling of 20001021002200 in words is "twenty trillion, one billion, twenty-one million, two thousand, two hundred".