12020200021 has 16 divisors (see below), whose sum is σ = 12249849024. Its totient is φ = 11792875264.

The previous prime is 12020200019. The next prime is 12020200097. The reversal of 12020200021 is 12000202021.

It is a cyclic number.

It is not a de Polignac number, because 12020200021 - 2¹ = 12020200019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020199980 and 12020200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020270021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12302685 + ... + 12303661.

It is an arithmetic number, because the mean of its divisors is an integer number (765615564).

Almost surely, 2^12020200021 is an apocalyptic number.

It is an amenable number.

12020200021 is a deficient number, since it is larger than the sum of its proper divisors (229649003).

12020200021 is an equidigital number, since it uses as much as digits as its factorization.

12020200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12020200021 its reverse (12000202021), we get a palindrome (24020402042).

It can be divided in two parts, 120202000 and 21, that added together give a palindrome (120202021).

The spelling of 12020200021 in words is "twelve billion, twenty million, two hundred thousand, twenty-one".