20002002210100 has 72 divisors (see below), whose sum is σ = 45969987029400. Its totient is φ = 7528126341120.

The previous prime is 20002002210097. The next prime is 20002002210101. The reversal of 20002002210100 is 101220020002.

It can be written as a sum of positive squares in 12 ways, for example, as 11138532453136 + 8863469756964 = 3337444^2 + 2977158^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002002210101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4693626 + ... + 7876174.

It is an arithmetic number, because the mean of its divisors is an integer number (638472042075).

Almost surely, 2^{20002002210100} is an apocalyptic number.

20002002210100 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 20002002210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22984993514700).

20002002210100 is an abundant number, since it is smaller than the sum of its proper divisors (25967984819300).

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

20002002210100 is a wasteful number, since it uses less digits than its factorization.

20002002210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186277 (or 3186270 counting only the distinct ones).

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

Adding to 20002002210100 its reverse (101220020002), we get a palindrome (20103222230102).

The spelling of 20002002210100 in words is "twenty trillion, two billion, two million, two hundred ten thousand, one hundred".