12011110020 has 288 divisors, whose sum is σ = 45886993152. Its totient is φ = 2475131904.

The previous prime is 12011110019. The next prime is 12011110021. The reversal of 12011110020 is 2001111021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12011110019) and next prime (12011110021).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12011109984 and 12011110011.

It is not an unprimeable number, because it can be changed into a prime (12011110021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 695814 + ... + 712866.

Almost surely, 2^12011110020 is an apocalyptic number.

12011110020 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 12011110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22943496576).

12011110020 is an abundant number, since it is smaller than the sum of its proper divisors (33875883132).

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

12011110020 is a wasteful number, since it uses less digits than its factorization.

12011110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17131 (or 17126 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12011110020 its reverse (2001111021), we get a palindrome (14012221041).

The spelling of 12011110020 in words is "twelve billion, eleven million, one hundred ten thousand, twenty".