12031020 has 72 divisors (see below), whose sum is σ = 36953280. Its totient is φ = 3168000.

The previous prime is 12031003. The next prime is 12031039. The reversal of 12031020 is 2013021.

It is a happy number.

12031020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 = 12030993 and 12031011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15645 + ... + 16395.

It is an arithmetic number, because the mean of its divisors is an integer number (513240).

Almost surely, 2^12031020 is an apocalyptic number.

12031020 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 12031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18476640).

12031020 is an abundant number, since it is smaller than the sum of its proper divisors (24922260).

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

12031020 is a wasteful number, since it uses less digits than its factorization.

12031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12031020 is about 3468.5760767208. The cubic root of 12031020 is about 229.1399511924.

Adding to 12031020 its reverse (2013021), we get a palindrome (14044041).

The spelling of 12031020 in words is "twelve million, thirty-one thousand, twenty".