222121220220220 has 96 divisors (see below), whose sum is σ = 475576956126720. Its totient is φ = 87120072080640.

The previous prime is 222121220220203. The next prime is 222121220220241. The reversal of 222121220220220 is 22022022121222.

It is a junction number, because it is equal to n+sod(n) for n = 222121220220191 and 222121220220200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1913015407 + ... + 1913131513.

It is an arithmetic number, because the mean of its divisors is an integer number (4953926626320).

Almost surely, 2^{222121220220220} is an apocalyptic number.

222121220220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121220220220 is an abundant number, since it is smaller than the sum of its proper divisors (253455735906500).

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

222121220220220 is a wasteful number, since it uses less digits than its factorization.

222121220220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121043 (or 121041 counting only the distinct ones).

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

Adding to 222121220220220 its reverse (22022022121222), we get a palindrome (244143242341442).

The spelling of 222121220220220 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty".