12221117 has 2 divisors, whose sum is σ = 12221118. Its totient is φ = 12221116.

The previous prime is 12221107. The next prime is 12221171. The reversal of 12221117 is 71112221.

Together with next prime (12221171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11363641 + 857476 = 3371^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221117 - 2¹⁶ = 12155581 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221095 and 12221104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110558 + 6110559.

It is an arithmetic number, because the mean of its divisors is an integer number (6110559).

Almost surely, 2^12221117 is an apocalyptic number.

It is an amenable number.

12221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221117 is an equidigital number, since it uses as much as digits as its factorization.

12221117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 17.

The square root of 12221117 is about 3495.8714221207. The cubic root of 12221117 is about 230.3404975608.

Adding to 12221117 its reverse (71112221), we get a palindrome (83333338).

The spelling of 12221117 in words is "twelve million, two hundred twenty-one thousand, one hundred seventeen".