12012231020 has 48 divisors (see below), whose sum is σ = 25835283936. Its totient is φ = 4689984000.

The previous prime is 12012231017. The next prime is 12012231029. The reversal of 12012231020 is 2013221021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12012230986 and 12012231004.

It is not an unprimeable number, because it can be changed into a prime (12012231029) 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 15 ways as a sum of consecutive naturals, for example, 122240 + ... + 197400.

It is an arithmetic number, because the mean of its divisors is an integer number (538235082).

Almost surely, 2^12012231020 is an apocalyptic number.

12012231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012231020 is an abundant number, since it is smaller than the sum of its proper divisors (13823052916).

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

12012231020 is a wasteful number, since it uses less digits than its factorization.

12012231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75362 (or 75360 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12012231020 its reverse (2013221021), we get a palindrome (14025452041).

Subtracting from 12012231020 its reverse (2013221021), we obtain a palindrome (9999009999).

The spelling of 12012231020 in words is "twelve billion, twelve million, two hundred thirty-one thousand, twenty".