12012011020 has 12 divisors (see below), whose sum is σ = 25225223184. Its totient is φ = 4804804400.

The previous prime is 12012011009. The next prime is 12012011021. The reversal of 12012011020 is 2011021021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12012010988 and 12012011006.

It is not an unprimeable number, because it can be changed into a prime (12012011021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 300300256 + ... + 300300295.

It is an arithmetic number, because the mean of its divisors is an integer number (2102101932).

Almost surely, 2^12012011020 is an apocalyptic number.

12012011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012011020 is an abundant number, since it is smaller than the sum of its proper divisors (13213212164).

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

12012011020 is a wasteful number, since it uses less digits than its factorization.

12012011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600600560 (or 600600558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12012011020 its reverse (2011021021), we get a palindrome (14023032041).

The spelling of 12012011020 in words is "twelve billion, twelve million, eleven thousand, twenty".