220222201221 has 32 divisors (see below), whose sum is σ = 355940826240. Its totient is φ = 133458192000.

The previous prime is 220222201207. The next prime is 220222201223. The reversal of 220222201221 is 122102222022.

220222201221 is a `hidden beast` number, since 2 + 20 + 222 + 201 + 221 = 666.

It is not a de Polignac number, because 220222201221 - 2⁷ = 220222201093 is a prime.

It is a super-2 number, since 2×220222201221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220222201194 and 220222201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222201223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7794921 + ... + 7823121.

It is an arithmetic number, because the mean of its divisors is an integer number (11123150820).

Almost surely, 2^220222201221 is an apocalyptic number.

It is an amenable number.

220222201221 is a deficient number, since it is larger than the sum of its proper divisors (135718625019).

220222201221 is a wasteful number, since it uses less digits than its factorization.

220222201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54514 (or 54508 counting only the distinct ones).

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

Adding to 220222201221 its reverse (122102222022), we get a palindrome (342324423243).

The spelling of 220222201221 in words is "two hundred twenty billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".