221201220222220 has 144 divisors (see below), whose sum is σ = 602262146676960. Its totient is φ = 67622416275456.

The previous prime is 221201220222211. The next prime is 221201220222251. The reversal of 221201220222220 is 22222022102122.

221201220222220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221201220222191 and 221201220222200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 349088307 + ... + 349721386.

It is an arithmetic number, because the mean of its divisors is an integer number (4182376018590).

Almost surely, 2^{221201220222220} is an apocalyptic number.

221201220222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201220222220 is an abundant number, since it is smaller than the sum of its proper divisors (381060926454740).

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

221201220222220 is a wasteful number, since it uses less digits than its factorization.

221201220222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698809752 (or 698809743 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221201220222220 its reverse (22222022102122), we get a palindrome (243423242324342).

The spelling of 221201220222220 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty".