12020202011021 has 4 divisors (see below), whose sum is σ = 12020374544412. Its totient is φ = 12020029477632.

The previous prime is 12020202011003. The next prime is 12020202011023. The reversal of 12020202011021 is 12011020202021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6871795630921 + 5148406380100 = 2621411^2 + 2269010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020202011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020202010987 and 12020202011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020202011023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86162150 + ... + 86301543.

It is an arithmetic number, because the mean of its divisors is an integer number (3005093636103).

Almost surely, 2^{12020202011021} is an apocalyptic number.

It is an amenable number.

12020202011021 is a deficient number, since it is larger than the sum of its proper divisors (172533391).

12020202011021 is an equidigital number, since it uses as much as digits as its factorization.

12020202011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172533390.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12020202011021 its reverse (12011020202021), we get a palindrome (24031222213042).

The spelling of 12020202011021 in words is "twelve trillion, twenty billion, two hundred two million, eleven thousand, twenty-one".