111131612513 has 2 divisors, whose sum is σ = 111131612514. Its totient is φ = 111131612512.

The previous prime is 111131612491. The next prime is 111131612533. The reversal of 111131612513 is 315216131111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110937623329 + 193989184 = 333073^2 + 13928^2 .

It is a cyclic number.

It is not a de Polignac number, because 111131612513 - 2¹⁴ = 111131596129 is a prime.

It is not a weakly prime, because it can be changed into another prime (111131612533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565806256 + 55565806257.

It is an arithmetic number, because the mean of its divisors is an integer number (55565806257).

Almost surely, 2^111131612513 is an apocalyptic number.

It is an amenable number.

111131612513 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131612513 is an equidigital number, since it uses as much as digits as its factorization.

111131612513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 26.

Adding to 111131612513 its reverse (315216131111), we get a palindrome (426347743624).

The spelling of 111131612513 in words is "one hundred eleven billion, one hundred thirty-one million, six hundred twelve thousand, five hundred thirteen".