201020221100 has 36 divisors (see below), whose sum is σ = 436240443408. Its totient is φ = 80403192000.

The previous prime is 201020221093. The next prime is 201020221111. The reversal of 201020221100 is 1122020102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1902665 + ... + 2005535.

Almost surely, 2^201020221100 is an apocalyptic number.

201020221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020221100 is an abundant number, since it is smaller than the sum of its proper divisors (235220222308).

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

201020221100 is a wasteful number, since it uses less digits than its factorization.

201020221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122426 (or 122419 counting only the distinct ones).

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

Adding to 201020221100 its reverse (1122020102), we get a palindrome (202142241202).

It can be divided in two parts, 2010202 and 21100, that added together give a palindrome (2031302).

The spelling of 201020221100 in words is "two hundred one billion, twenty million, two hundred twenty-one thousand, one hundred".