11123111020 has 24 divisors (see below), whose sum is σ = 26695466784. Its totient is φ = 3813638016.

The previous prime is 11123111017. The next prime is 11123111093. The reversal of 11123111020 is 2011132111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39725257 + ... + 39725536.

It is an arithmetic number, because the mean of its divisors is an integer number (1112311116).

Almost surely, 2^11123111020 is an apocalyptic number.

11123111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11123111020 is an abundant number, since it is smaller than the sum of its proper divisors (15572355764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11123111020 is a wasteful number, since it uses less digits than its factorization.

11123111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79450809 (or 79450807 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11123111020 its reverse (2011132111), we get a palindrome (13134243131).

The spelling of 11123111020 in words is "eleven billion, one hundred twenty-three million, one hundred eleven thousand, twenty".