12011111111020 has 48 divisors (see below), whose sum is σ = 28835353128960. Its totient is φ = 4116854314944.

The previous prime is 12011111110987. The next prime is 12011111111047. The reversal of 12011111111020 is 2011111111021.

It is a super-3 number, since 3×12011111111020³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12459964 + ... + 13389283.

It is an arithmetic number, because the mean of its divisors is an integer number (600736523520).

Almost surely, 2^{12011111111020} is an apocalyptic number.

12011111111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011111111020 is an abundant number, since it is smaller than the sum of its proper divisors (16824242017940).

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

12011111111020 is a wasteful number, since it uses less digits than its factorization.

12011111111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25852582 (or 25852580 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 12011111111020 its reverse (2011111111021), we get a palindrome (14022222222041).

Subtracting from 12011111111020 its reverse (2011111111021), we obtain a palindrome (9999999999999).

The spelling of 12011111111020 in words is "twelve trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, twenty".