11127138917 has 2 divisors, whose sum is σ = 11127138918. Its totient is φ = 11127138916.

The previous prime is 11127138859. The next prime is 11127138923. The reversal of 11127138917 is 71983172111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7231631521 + 3895507396 = 85039^2 + 62414^2 .

It is a cyclic number.

It is not a de Polignac number, because 11127138917 - 2¹⁴ = 11127122533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11127138947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5563569458 + 5563569459.

It is an arithmetic number, because the mean of its divisors is an integer number (5563569459).

Almost surely, 2^11127138917 is an apocalyptic number.

It is an amenable number.

11127138917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11127138917 is an equidigital number, since it uses as much as digits as its factorization.

11127138917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 41.

The spelling of 11127138917 in words is "eleven billion, one hundred twenty-seven million, one hundred thirty-eight thousand, nine hundred seventeen".