222102028021 has 2 divisors, whose sum is σ = 222102028022. Its totient is φ = 222102028020.

The previous prime is 222102028003. The next prime is 222102028079. The reversal of 222102028021 is 120820201222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219060505521 + 3041522500 = 468039^2 + 55150^2 .

It is a cyclic number.

It is not a de Polignac number, because 222102028021 - 2⁹ = 222102027509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222102027983 and 222102028001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222102038021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111051014010 + 111051014011.

It is an arithmetic number, because the mean of its divisors is an integer number (111051014011).

Almost surely, 2^222102028021 is an apocalyptic number.

It is an amenable number.

222102028021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222102028021 is an equidigital number, since it uses as much as digits as its factorization.

222102028021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222102028021 its reverse (120820201222), we get a palindrome (342922229243).

The spelling of 222102028021 in words is "two hundred twenty-two billion, one hundred two million, twenty-eight thousand, twenty-one".