201020021100 has 108 divisors (see below), whose sum is σ = 634099821264. Its totient is φ = 53263866240.

The previous prime is 201020021089. The next prime is 201020021101. The reversal of 201020021100 is 1120020102.

201020021100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (201020021101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 570024 + ... + 852623.

Almost surely, 2^201020021100 is an apocalyptic number.

201020021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020021100 is an abundant number, since it is smaller than the sum of its proper divisors (433079800164).

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

201020021100 is a wasteful number, since it uses less digits than its factorization.

201020021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422824 (or 1422814 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201020021100 its reverse (1120020102), we get a palindrome (202140041202).

The spelling of 201020021100 in words is "two hundred one billion, twenty million, twenty-one thousand, one hundred".