222021212221117 has 2 divisors, whose sum is σ = 222021212221118. Its totient is φ = 222021212221116.

The previous prime is 222021212221099. The next prime is 222021212221147. The reversal of 222021212221117 is 711122212120222.

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., 214191098702361 + 7830113518756 = 14635269^2 + 2798234^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021212221117 - 2¹¹ = 222021212219069 is a prime.

It is a super-2 number, since 2×222021212221117² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222021212221147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010606110558 + 111010606110559.

It is an arithmetic number, because the mean of its divisors is an integer number (111010606110559).

Almost surely, 2^{222021212221117} is an apocalyptic number.

It is an amenable number.

222021212221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

222021212221117 is an equidigital number, since it uses as much as digits as its factorization.

222021212221117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 222021212221117 its reverse (711122212120222), we get a palindrome (933143424341339).

The spelling of 222021212221117 in words is "two hundred twenty-two trillion, twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred seventeen".