11121613 has 2 divisors, whose sum is σ = 11121614. Its totient is φ = 11121612.

The previous prime is 11121611. The next prime is 11121629. The reversal of 11121613 is 31612111.

It is an a-pointer prime, because the next prime (11121629) can be obtained adding 11121613 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8743849 + 2377764 = 2957^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121613 - 2¹ = 11121611 is a prime.

Together with 11121611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560806 + 5560807.

It is an arithmetic number, because the mean of its divisors is an integer number (5560807).

Almost surely, 2^11121613 is an apocalyptic number.

It is an amenable number.

11121613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121613 is an equidigital number, since it uses as much as digits as its factorization.

11121613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 16.

The square root of 11121613 is about 3334.9082446148. The cubic root of 11121613 is about 223.2145976608.

Adding to 11121613 its reverse (31612111), we get a palindrome (42733724).

The spelling of 11121613 in words is "eleven million, one hundred twenty-one thousand, six hundred thirteen".