11423511111 has 4 divisors (see below), whose sum is σ = 15231348152. Its totient is φ = 7615674072.

The previous prime is 11423511103. The next prime is 11423511119. The reversal of 11423511111 is 11111532411.

11423511111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11423511103) and next prime (11423511119).

It is not a de Polignac number, because 11423511111 - 2³ = 11423511103 is a prime.

It is a super-2 number, since 2×11423511111² (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 (11423511119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903918516 + ... + 1903918521.

It is an arithmetic number, because the mean of its divisors is an integer number (3807837038).

Almost surely, 2^11423511111 is an apocalyptic number.

11423511111 is a deficient number, since it is larger than the sum of its proper divisors (3807837041).

11423511111 is an equidigital number, since it uses as much as digits as its factorization.

11423511111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807837040.

The product of its digits is 120, while the sum is 21.

The spelling of 11423511111 in words is "eleven billion, four hundred twenty-three million, five hundred eleven thousand, one hundred eleven".