201220222220 has 24 divisors (see below), whose sum is σ = 447419083104. Its totient is φ = 75753495296.

The previous prime is 201220222211. The next prime is 201220222243. The reversal of 201220222220 is 22222022102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295911752 + ... + 295912431.

It is an arithmetic number, because the mean of its divisors is an integer number (18642461796).

Almost surely, 2^201220222220 is an apocalyptic number.

201220222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220222220 is an abundant number, since it is smaller than the sum of its proper divisors (246198860884).

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

201220222220 is a wasteful number, since it uses less digits than its factorization.

201220222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591824209 (or 591824207 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 201220222220 its reverse (22222022102), we get a palindrome (223442244322).

The spelling of 201220222220 in words is "two hundred one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty".