222220102021 has 2 divisors, whose sum is σ = 222220102022. Its totient is φ = 222220102020.

The previous prime is 222220101977. The next prime is 222220102033. The reversal of 222220102021 is 120201022222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170497971396 + 51722130625 = 412914^2 + 227425^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220102021 - 2³⁵ = 187860363653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222220101986 and 222220102004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222220102061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110051010 + 111110051011.

It is an arithmetic number, because the mean of its divisors is an integer number (111110051011).

Almost surely, 2^222220102021 is an apocalyptic number.

It is an amenable number.

222220102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222220102021 is an equidigital number, since it uses as much as digits as its factorization.

222220102021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 222220102021 its reverse (120201022222), we get a palindrome (342421124243).

The spelling of 222220102021 in words is "two hundred twenty-two billion, two hundred twenty million, one hundred two thousand, twenty-one".