12031220020 has 12 divisors (see below), whose sum is σ = 25265562084. Its totient is φ = 4812488000.

The previous prime is 12031220017. The next prime is 12031220021. The reversal of 12031220020 is 2002213021.

It can be written as a sum of positive squares in 2 ways, for example, as 8201838096 + 3829381924 = 90564^2 + 61882^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031220021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300780481 + ... + 300780520.

It is an arithmetic number, because the mean of its divisors is an integer number (2105463507).

Almost surely, 2^12031220020 is an apocalyptic number.

12031220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031220020 is an abundant number, since it is smaller than the sum of its proper divisors (13234342064).

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

12031220020 is a wasteful number, since it uses less digits than its factorization.

12031220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601561010 (or 601561008 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12031220020 its reverse (2002213021), we get a palindrome (14033433041).

The spelling of 12031220020 in words is "twelve billion, thirty-one million, two hundred twenty thousand, twenty".