11513020513123 has 4 divisors (see below), whose sum is σ = 11513055515760. Its totient is φ = 11512985510488.

The previous prime is 11513020513091. The next prime is 11513020513151. The reversal of 11513020513123 is 32131502031511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11513020513123 - 2⁵ = 11513020513091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11513020513091 and 11513020513100.

It is not an unprimeable number, because it can be changed into a prime (11513020513193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003215 + ... + 17667352.

It is an arithmetic number, because the mean of its divisors is an integer number (2878263878940).

Almost surely, 2^{11513020513123} is an apocalyptic number.

11513020513123 is a deficient number, since it is larger than the sum of its proper divisors (35002637).

11513020513123 is an equidigital number, since it uses as much as digits as its factorization.

11513020513123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35002636.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 11513020513123 its reverse (32131502031511), we get a palindrome (43644522544634).

The spelling of 11513020513123 in words is "eleven trillion, five hundred thirteen billion, twenty million, five hundred thirteen thousand, one hundred twenty-three".