12032020021 has 6 divisors (see below), whose sum is σ = 13996431510. Its totient is φ = 10313159976.

The previous prime is 12032020003. The next prime is 12032020027. The reversal of 12032020021 is 12002023021.

It can be written as a sum of positive squares in only one way, i.e., 10411957521 + 1620062500 = 102039^2 + 40250^2 .

It is not a de Polignac number, because 12032020021 - 2²¹ = 12029922869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12032019983 and 12032020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12032020027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122775666 + ... + 122775763.

It is an arithmetic number, because the mean of its divisors is an integer number (2332738585).

Almost surely, 2^12032020021 is an apocalyptic number.

It is an amenable number.

12032020021 is a deficient number, since it is larger than the sum of its proper divisors (1964411489).

12032020021 is an equidigital number, since it uses as much as digits as its factorization.

12032020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245551443 (or 245551436 counting only the distinct ones).

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

Adding to 12032020021 its reverse (12002023021), we get a palindrome (24034043042).

The spelling of 12032020021 in words is "twelve billion, thirty-two million, twenty thousand, twenty-one".