20021020210100 has 288 divisors, whose sum is σ = 54973738288896. Its totient is φ = 6159429734400.

The previous prime is 20021020210097. The next prime is 20021020210157. The reversal of 20021020210100 is 101202012002.

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, 103251839 + ... + 103445561.

Almost surely, 2^{20021020210100} is an apocalyptic number.

20021020210100 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 20021020210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27486869144448).

20021020210100 is an abundant number, since it is smaller than the sum of its proper divisors (34952718078796).

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

20021020210100 is a wasteful number, since it uses less digits than its factorization.

20021020210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194075 (or 194068 counting only the distinct ones).

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

Adding to 20021020210100 its reverse (101202012002), we get a palindrome (20122222222102).

The spelling of 20021020210100 in words is "twenty trillion, twenty-one billion, twenty million, two hundred ten thousand, one hundred".