12011100020 has 96 divisors (see below), whose sum is σ = 26718854400. Its totient is φ = 4526337024.

The previous prime is 12011100011. The next prime is 12011100077. The reversal of 12011100020 is 2000111021.

It is a junction number, because it is equal to n+sod(n) for n = 12011099980 and 12011100007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16252811 + ... + 16253549.

It is an arithmetic number, because the mean of its divisors is an integer number (278321400).

Almost surely, 2^12011100020 is an apocalyptic number.

12011100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13359427200).

12011100020 is an abundant number, since it is smaller than the sum of its proper divisors (14707754380).

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

12011100020 is a wasteful number, since it uses less digits than its factorization.

12011100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12011100020 its reverse (2000111021), we get a palindrome (14011211041).

The spelling of 12011100020 in words is "twelve billion, eleven million, one hundred thousand, twenty".