12003031020 has 48 divisors (see below), whose sum is σ = 33922603008. Its totient is φ = 3170892480.

The previous prime is 12003030961. The next prime is 12003031031. The reversal of 12003031020 is 2013030021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12003030987 and 12003031005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928396 + ... + 941235.

It is an arithmetic number, because the mean of its divisors is an integer number (706720896).

Almost surely, 2^12003031020 is an apocalyptic number.

12003031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003031020 is an abundant number, since it is smaller than the sum of its proper divisors (21919571988).

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

12003031020 is a wasteful number, since it uses less digits than its factorization.

12003031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869750 (or 1869748 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 12003031020 its reverse (2013030021), we get a palindrome (14016061041).

Subtracting from 12003031020 its reverse (2013030021), we obtain a palindrome (9990000999).

The spelling of 12003031020 in words is "twelve billion, three million, thirty-one thousand, twenty".