1227765938117 has 2 divisors, whose sum is σ = 1227765938118. Its totient is φ = 1227765938116.

The previous prime is 1227765938111. The next prime is 1227765938137. The reversal of 1227765938117 is 7118395677221.

It is a Cunningham number, because it is equal to 1108046²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227765938116 + 1 = 1108046^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227765938117 - 2¹⁶ = 1227765872581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227765938111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613882969058 + 613882969059.

It is an arithmetic number, because the mean of its divisors is an integer number (613882969059).

Almost surely, 2^{1227765938117} is an apocalyptic number.

It is an amenable number.

1227765938117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227765938117 is an equidigital number, since it uses as much as digits as its factorization.

1227765938117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 59.

The spelling of 1227765938117 in words is "one trillion, two hundred twenty-seven billion, seven hundred sixty-five million, nine hundred thirty-eight thousand, one hundred seventeen".