11115205112131 has 2 divisors, whose sum is σ = 11115205112132. Its totient is φ = 11115205112130.

The previous prime is 11115205112111. The next prime is 11115205112153. The reversal of 11115205112131 is 13121150251111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11115205112131 - 2³¹ = 11113057628483 is a prime.

It is a super-2 number, since 2×11115205112131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11115205112096 and 11115205112105.

It is not a weakly prime, because it can be changed into another prime (11115205112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557602556065 + 5557602556066.

It is an arithmetic number, because the mean of its divisors is an integer number (5557602556066).

Almost surely, 2^{11115205112131} is an apocalyptic number.

11115205112131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115205112131 is an equidigital number, since it uses as much as digits as its factorization.

11115205112131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 25.

Adding to 11115205112131 its reverse (13121150251111), we get a palindrome (24236355363242).

The spelling of 11115205112131 in words is "eleven trillion, one hundred fifteen billion, two hundred five million, one hundred twelve thousand, one hundred thirty-one".