11113521361 has 2 divisors, whose sum is σ = 11113521362. Its totient is φ = 11113521360.

The previous prime is 11113521257. The next prime is 11113521379. The reversal of 11113521361 is 16312531111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5721409600 + 5392111761 = 75640^2 + 73431^2 .

It is a cyclic number.

It is not a de Polignac number, because 11113521361 - 2¹⁷ = 11113390289 is a prime.

It is not a weakly prime, because it can be changed into another prime (11113531361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556760680 + 5556760681.

It is an arithmetic number, because the mean of its divisors is an integer number (5556760681).

Almost surely, 2^11113521361 is an apocalyptic number.

It is an amenable number.

11113521361 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113521361 is an equidigital number, since it uses as much as digits as its factorization.

11113521361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 25.

It can be divided in two parts, 111135 and 21361, that added together give a square (132496 = 364²).

The spelling of 11113521361 in words is "eleven billion, one hundred thirteen million, five hundred twenty-one thousand, three hundred sixty-one".