202100211220 has 12 divisors (see below), whose sum is σ = 424410443604. Its totient is φ = 80840084480.

The previous prime is 202100211191. The next prime is 202100211241. The reversal of 202100211220 is 22112001202.

It is a happy number.

202100211220 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32225994256 + 169874216964 = 179516^2 + 412158^2 .

It is a super-2 number, since 2×202100211220² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202100211220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5052505261 + ... + 5052505300.

It is an arithmetic number, because the mean of its divisors is an integer number (35367536967).

Almost surely, 2^202100211220 is an apocalyptic number.

202100211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100211220 is an abundant number, since it is smaller than the sum of its proper divisors (222310232384).

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

202100211220 is a wasteful number, since it uses less digits than its factorization.

202100211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105010570 (or 10105010568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202100211220 its reverse (22112001202), we get a palindrome (224212212422).

The spelling of 202100211220 in words is "two hundred two billion, one hundred million, two hundred eleven thousand, two hundred twenty".