11123457211 has 2 divisors, whose sum is σ = 11123457212. Its totient is φ = 11123457210.

The previous prime is 11123457143. The next prime is 11123457227. The reversal of 11123457211 is 11275432111.

It is a strong prime.

It is an emirp because it is prime and its reverse (11275432111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11123457211 - 2¹⁷ = 11123326139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11123457211.

It is not a weakly prime, because it can be changed into another prime (11123457251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561728605 + 5561728606.

It is an arithmetic number, because the mean of its divisors is an integer number (5561728606).

Almost surely, 2^11123457211 is an apocalyptic number.

11123457211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123457211 is an equidigital number, since it uses as much as digits as its factorization.

11123457211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

Adding to 11123457211 its reverse (11275432111), we get a palindrome (22398889322).

The spelling of 11123457211 in words is "eleven billion, one hundred twenty-three million, four hundred fifty-seven thousand, two hundred eleven".