220220102222221 has 2 divisors, whose sum is σ = 220220102222222. Its totient is φ = 220220102222220.

The previous prime is 220220102222167. The next prime is 220220102222269. The reversal of 220220102222221 is 122222201022022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167914662159721 + 52305440062500 = 12958189^2 + 7232250^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220102222221 - 2³⁹ = 219670346408333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220220102222192 and 220220102222201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220220102222821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110051111110 + 110110051111111.

It is an arithmetic number, because the mean of its divisors is an integer number (110110051111111).

Almost surely, 2^{220220102222221} is an apocalyptic number.

It is an amenable number.

220220102222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220102222221 is an equidigital number, since it uses as much as digits as its factorization.

220220102222221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 220220102222221 its reverse (122222201022022), we get a palindrome (342442303244243).

The spelling of 220220102222221 in words is "two hundred twenty trillion, two hundred twenty billion, one hundred two million, two hundred twenty-two thousand, two hundred twenty-one".