11012261311511 has 2 divisors, whose sum is σ = 11012261311512. Its totient is φ = 11012261311510.

The previous prime is 11012261311487. The next prime is 11012261311529. The reversal of 11012261311511 is 11511316221011.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11511316221011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11012261311511 - 2³⁰ = 11011187569687 is a prime.

It is a super-2 number, since 2×11012261311511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012261311411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506130655755 + 5506130655756.

It is an arithmetic number, because the mean of its divisors is an integer number (5506130655756).

Almost surely, 2^{11012261311511} is an apocalyptic number.

11012261311511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012261311511 is an equidigital number, since it uses as much as digits as its factorization.

11012261311511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 26.

Adding to 11012261311511 its reverse (11511316221011), we get a palindrome (22523577532522).

The spelling of 11012261311511 in words is "eleven trillion, twelve billion, two hundred sixty-one million, three hundred eleven thousand, five hundred eleven".