11111152513 has 2 divisors, whose sum is σ = 11111152514. Its totient is φ = 11111152512.

The previous prime is 11111152483. The next prime is 11111152531. The reversal of 11111152513 is 31525111111.

It is a happy number.

Together with next prime (11111152531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9371595249 + 1739557264 = 96807^2 + 41708^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111152513 - 2⁹ = 11111152001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111152543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555576256 + 5555576257.

It is an arithmetic number, because the mean of its divisors is an integer number (5555576257).

Almost surely, 2^11111152513 is an apocalyptic number.

It is an amenable number.

11111152513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111152513 is an equidigital number, since it uses as much as digits as its factorization.

11111152513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150, while the sum is 22.

Adding to 11111152513 its reverse (31525111111), we get a palindrome (42636263624).

The spelling of 11111152513 in words is "eleven billion, one hundred eleven million, one hundred fifty-two thousand, five hundred thirteen".