11271509993 has 2 divisors, whose sum is σ = 11271509994. Its totient is φ = 11271509992.

The previous prime is 11271509981. The next prime is 11271509999. The reversal of 11271509993 is 39990517211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10122774544 + 1148735449 = 100612^2 + 33893^2 .

It is a cyclic number.

It is not a de Polignac number, because 11271509993 - 2²⁴ = 11254732777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11271509999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5635754996 + 5635754997.

It is an arithmetic number, because the mean of its divisors is an integer number (5635754997).

Almost surely, 2^11271509993 is an apocalyptic number.

It is an amenable number.

11271509993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11271509993 is an equidigital number, since it uses as much as digits as its factorization.

11271509993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 47.

The spelling of 11271509993 in words is "eleven billion, two hundred seventy-one million, five hundred nine thousand, nine hundred ninety-three".