202221211220 has 48 divisors (see below), whose sum is σ = 485405251968. Its totient is φ = 69322366080.

The previous prime is 202221211207. The next prime is 202221211229. The reversal of 202221211220 is 22112122202.

It is a happy number.

202221211220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221211229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 835355 + ... + 1049885.

It is an arithmetic number, because the mean of its divisors is an integer number (10112609416).

Almost surely, 2^202221211220 is an apocalyptic number.

202221211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202221211220 is an abundant number, since it is smaller than the sum of its proper divisors (283184040748).

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

202221211220 is a wasteful number, since it uses less digits than its factorization.

202221211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221280 (or 221278 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202221211220 its reverse (22112122202), we get a palindrome (224333333422).

The spelling of 202221211220 in words is "two hundred two billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty".