202100201220 has 48 divisors (see below), whose sum is σ = 566410098240. Its totient is φ = 53842955136.

The previous prime is 202100201203. The next prime is 202100201221. The reversal of 202100201220 is 22102001202.

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

It is a junction number, because it is equal to n+sod(n) for n = 202100201196 and 202100201205.

It is not an unprimeable number, because it can be changed into a prime (202100201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511322 + ... + 1639601.

It is an arithmetic number, because the mean of its divisors is an integer number (11800210380).

Almost surely, 2^202100201220 is an apocalyptic number.

202100201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100201220 is an abundant number, since it is smaller than the sum of its proper divisors (364309897020).

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

202100201220 is a wasteful number, since it uses less digits than its factorization.

202100201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152004 (or 3152002 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202100201220 its reverse (22102001202), we get a palindrome (224202202422).

The spelling of 202100201220 in words is "two hundred two billion, one hundred million, two hundred one thousand, two hundred twenty".