1226320130261 has 2 divisors, whose sum is σ = 1226320130262. Its totient is φ = 1226320130260.

The previous prime is 1226320130251. The next prime is 1226320130263. The reversal of 1226320130261 is 1620310236221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210110002500 + 16210127761 = 1100050^2 + 127319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226320130261 - 2⁶ = 1226320130197 is a prime.

It is a super-2 number, since 2×1226320130261² (a number of 25 digits) contains 22 as substring.

Together with 1226320130263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226320130263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613160065130 + 613160065131.

It is an arithmetic number, because the mean of its divisors is an integer number (613160065131).

Almost surely, 2^{1226320130261} is an apocalyptic number.

It is an amenable number.

1226320130261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226320130261 is an equidigital number, since it uses as much as digits as its factorization.

1226320130261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 1226320130261 its reverse (1620310236221), we get a palindrome (2846630366482).

The spelling of 1226320130261 in words is "one trillion, two hundred twenty-six billion, three hundred twenty million, one hundred thirty thousand, two hundred sixty-one".