201020201100 has 54 divisors (see below), whose sum is σ = 630086655380. Its totient is φ = 53605386720.

The previous prime is 201020201029. The next prime is 201020201101. The reversal of 201020201100 is 1102020102.

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 (201020201101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111676990 + ... + 111678789.

Almost surely, 2^201020201100 is an apocalyptic number.

201020201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020201100 is an abundant number, since it is smaller than the sum of its proper divisors (429066454280).

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

201020201100 is a wasteful number, since it uses less digits than its factorization.

201020201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223355799 (or 223355789 counting only the distinct ones).

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

Adding to 201020201100 its reverse (1102020102), we get a palindrome (202122221202).

The spelling of 201020201100 in words is "two hundred one billion, twenty million, two hundred one thousand, one hundred".