11211913 has 2 divisors, whose sum is σ = 11211914. Its totient is φ = 11211912.

The previous prime is 11211899. The next prime is 11211923. The reversal of 11211913 is 31911211.

11211913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11209104 + 2809 = 3348^2 + 53^2 .

It is an emirp because it is prime and its reverse (31911211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211913 - 2⁹ = 11211401 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605956 + 5605957.

It is an arithmetic number, because the mean of its divisors is an integer number (5605957).

Almost surely, 2^11211913 is an apocalyptic number.

It is an amenable number.

11211913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211913 is an equidigital number, since it uses as much as digits as its factorization.

11211913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 19.

The square root of 11211913 is about 3348.4194779030. The cubic root of 11211913 is about 223.8170873392.

The spelling of 11211913 in words is "eleven million, two hundred eleven thousand, nine hundred thirteen".