11103320511 has 24 divisors (see below), whose sum is σ = 16655277184. Its totient is φ = 7391914200.

The previous prime is 11103320497. The next prime is 11103320537. The reversal of 11103320511 is 11502330111.

It is not a de Polignac number, because 11103320511 - 2⁵ = 11103320479 is a prime.

It is a super-2 number, since 2×11103320511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103320581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145236 + ... + 208086.

Almost surely, 2^11103320511 is an apocalyptic number.

11103320511 is a deficient number, since it is larger than the sum of its proper divisors (5551956673).

11103320511 is an frugal number, since it uses more digits than its factorization.

11103320511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63593 (or 63581 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 11103320511 its reverse (11502330111), we get a palindrome (22605650622).

The spelling of 11103320511 in words is "eleven billion, one hundred three million, three hundred twenty thousand, five hundred eleven".