202212221220 has 72 divisors (see below), whose sum is σ = 613794854400. Its totient is φ = 53886530880.

The previous prime is 202212221219. The next prime is 202212221227. The reversal of 202212221220 is 22122212202.

202212221220 is a `hidden beast` number, since 2 + 0 + 221 + 2 + 221 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202212221193 and 202212221202.

It is not an unprimeable number, because it can be changed into a prime (202212221227) 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, 117070 + ... + 646629.

Almost surely, 2^202212221220 is an apocalyptic number.

202212221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202212221220 is an abundant number, since it is smaller than the sum of its proper divisors (411582633180).

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

202212221220 is a wasteful number, since it uses less digits than its factorization.

202212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765185 (or 765180 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202212221220 its reverse (22122212202), we get a palindrome (224334433422).

The spelling of 202212221220 in words is "two hundred two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".