11511243071 has 2 divisors, whose sum is σ = 11511243072. Its totient is φ = 11511243070.

The previous prime is 11511243041. The next prime is 11511243253. The reversal of 11511243071 is 17034211511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11511243071 - 2²² = 11507048767 is a prime.

It is a super-2 number, since 2×11511243071² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11511243071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11511243041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5755621535 + 5755621536.

It is an arithmetic number, because the mean of its divisors is an integer number (5755621536).

Almost surely, 2^11511243071 is an apocalyptic number.

11511243071 is a deficient number, since it is larger than the sum of its proper divisors (1).

11511243071 is an equidigital number, since it uses as much as digits as its factorization.

11511243071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 11511243071 its reverse (17034211511), we get a palindrome (28545454582).

The spelling of 11511243071 in words is "eleven billion, five hundred eleven million, two hundred forty-three thousand, seventy-one".