1000020222221 has 2 divisors, whose sum is σ = 1000020222222. Its totient is φ = 1000020222220.

The previous prime is 1000020222199. The next prime is 1000020222233. The reversal of 1000020222221 is 1222220200001.

1000020222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577578720196 + 422441502025 = 759986^2 + 649955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000020222221 - 2¹⁰ = 1000020221197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000020222196 and 1000020222205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000020222821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010111110 + 500010111111.

It is an arithmetic number, because the mean of its divisors is an integer number (500010111111).

Almost surely, 2^{1000020222221} is an apocalyptic number.

It is an amenable number.

1000020222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000020222221 is an equidigital number, since it uses as much as digits as its factorization.

1000020222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1000020222221 its reverse (1222220200001), we get a palindrome (2222240422222).

The spelling of 1000020222221 in words is "one trillion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".