201000222100 has 72 divisors (see below), whose sum is σ = 442796395328. Its totient is φ = 79181971200.

The previous prime is 201000222091. The next prime is 201000222103. The reversal of 201000222100 is 1222000102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000222103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5024377 + ... + 5064223.

Almost surely, 2^201000222100 is an apocalyptic number.

201000222100 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 201000222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221398197664).

201000222100 is an abundant number, since it is smaller than the sum of its proper divisors (241796173228).

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

201000222100 is a wasteful number, since it uses less digits than its factorization.

201000222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40625 (or 40618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201000222100 its reverse (1222000102), we get a palindrome (202222222202).

The spelling of 201000222100 in words is "two hundred one billion, two hundred twenty-two thousand, one hundred".