220012022221 has 4 divisors (see below), whose sum is σ = 220013030844. Its totient is φ = 220011013600.

The previous prime is 220012022213. The next prime is 220012022317. The reversal of 220012022221 is 122220210022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122220210022 = 2 ⋅61110105011.

It can be written as a sum of positive squares in 2 ways, for example, as 133216970121 + 86795052100 = 364989^2 + 294610^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012022221 - 2³ = 220012022213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220012022195 and 220012022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012022521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25720 + ... + 663841.

It is an arithmetic number, because the mean of its divisors is an integer number (55003257711).

Almost surely, 2^220012022221 is an apocalyptic number.

It is an amenable number.

220012022221 is a deficient number, since it is larger than the sum of its proper divisors (1008623).

220012022221 is an equidigital number, since it uses as much as digits as its factorization.

220012022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008622.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220012022221 its reverse (122220210022), we get a palindrome (342232232243).

The spelling of 220012022221 in words is "two hundred twenty billion, twelve million, twenty-two thousand, two hundred twenty-one".