202221001021100 has 144 divisors (see below), whose sum is σ = 469094751014400. Its totient is φ = 75479928691200.

The previous prime is 202221001021099. The next prime is 202221001021103. The reversal of 202221001021100 is 1120100122202.

It is not an unprimeable number, because it can be changed into a prime (202221001021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1888115351 + ... + 1888222449.

It is an arithmetic number, because the mean of its divisors is an integer number (3257602437600).

Almost surely, 2^{202221001021100} is an apocalyptic number.

202221001021100 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 202221001021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234547375507200).

202221001021100 is an abundant number, since it is smaller than the sum of its proper divisors (266873749993300).

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

202221001021100 is a wasteful number, since it uses less digits than its factorization.

202221001021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127200 (or 127193 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202221001021100 its reverse (1120100122202), we get a palindrome (203341101143302).

The spelling of 202221001021100 in words is "two hundred two trillion, two hundred twenty-one billion, one million, twenty-one thousand, one hundred".