222112201021 has 2 divisors, whose sum is σ = 222112201022. Its totient is φ = 222112201020.

The previous prime is 222112201009. The next prime is 222112201039. The reversal of 222112201021 is 120102211222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121441795225 + 100670405796 = 348485^2 + 317286^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112201021 - 2⁹ = 222112200509 is a prime.

It is a super-2 number, since 2×222112201021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222112200986 and 222112201004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222112201721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056100510 + 111056100511.

It is an arithmetic number, because the mean of its divisors is an integer number (111056100511).

Almost surely, 2^222112201021 is an apocalyptic number.

It is an amenable number.

222112201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112201021 is an equidigital number, since it uses as much as digits as its factorization.

222112201021 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 16.

Adding to 222112201021 its reverse (120102211222), we get a palindrome (342214412243).

The spelling of 222112201021 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred one thousand, twenty-one".