12226101221 has 2 divisors, whose sum is σ = 12226101222. Its totient is φ = 12226101220.

The previous prime is 12226101169. The next prime is 12226101233. The reversal of 12226101221 is 12210162221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8305588225 + 3920512996 = 91135^2 + 62614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12226101221 is a prime.

It is a super-2 number, since 2×12226101221² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12226101193 and 12226101202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12226121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113050610 + 6113050611.

It is an arithmetic number, because the mean of its divisors is an integer number (6113050611).

Almost surely, 2^12226101221 is an apocalyptic number.

It is an amenable number.

12226101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12226101221 is an equidigital number, since it uses as much as digits as its factorization.

12226101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12226101221 its reverse (12210162221), we get a palindrome (24436263442).

The spelling of 12226101221 in words is "twelve billion, two hundred twenty-six million, one hundred one thousand, two hundred twenty-one".