11505612113 has 4 divisors (see below), whose sum is σ = 11722699188. Its totient is φ = 11288525040.

The previous prime is 11505612103. The next prime is 11505612119. The reversal of 11505612113 is 31121650511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10295755024 + 1209857089 = 101468^2 + 34783^2 .

It is a cyclic number.

It is not a de Polignac number, because 11505612113 - 2⁶ = 11505612049 is a prime.

It is a super-2 number, since 2×11505612113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505612119) 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, 108543458 + ... + 108543563.

It is an arithmetic number, because the mean of its divisors is an integer number (2930674797).

Almost surely, 2^11505612113 is an apocalyptic number.

It is an amenable number.

11505612113 is a deficient number, since it is larger than the sum of its proper divisors (217087075).

11505612113 is an equidigital number, since it uses as much as digits as its factorization.

11505612113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217087074.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 11505612113 in words is "eleven billion, five hundred five million, six hundred twelve thousand, one hundred thirteen".