12011100111020 has 24 divisors (see below), whose sum is σ = 25223509949568. Its totient is φ = 4804402003200.

The previous prime is 12011100111019. The next prime is 12011100111091. The reversal of 12011100111020 is 2011100111021.

It is a junction number, because it is equal to n+sod(n) for n = 12011100110992 and 12011100111010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284165 + ... + 4909475.

It is an arithmetic number, because the mean of its divisors is an integer number (1050979581232).

Almost surely, 2^{12011100111020} is an apocalyptic number.

12011100111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011100111020 is an abundant number, since it is smaller than the sum of its proper divisors (13212409838548).

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

12011100111020 is a wasteful number, since it uses less digits than its factorization.

12011100111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755161 (or 4755159 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12011100111020 its reverse (2011100111021), we get a palindrome (14022200222041).

Subtracting from 12011100111020 its reverse (2011100111021), we obtain a palindrome (9999999999999).

The spelling of 12011100111020 in words is "twelve trillion, eleven billion, one hundred million, one hundred eleven thousand, twenty".