201021311100 has 36 divisors (see below), whose sum is σ = 581621660984. Its totient is φ = 53605682880.

The previous prime is 201021311047. The next prime is 201021311123. The reversal of 201021311100 is 1113120102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent 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, 335035219 + ... + 335035818.

Almost surely, 2^201021311100 is an apocalyptic number.

201021311100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021311100 is an abundant number, since it is smaller than the sum of its proper divisors (380600349884).

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

201021311100 is a wasteful number, since it uses less digits than its factorization.

201021311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670071054 (or 670071047 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 201021311100 its reverse (1113120102), we get a palindrome (202134431202).

The spelling of 201021311100 in words is "two hundred one billion, twenty-one million, three hundred eleven thousand, one hundred".