12100202321021 has 4 divisors (see below), whose sum is σ = 12101285318172. Its totient is φ = 12099119323872.

The previous prime is 12100202321017. The next prime is 12100202321033. The reversal of 12100202321021 is 12012320200121.

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 5182702668025 + 6917499652996 = 2276555^2 + 2630114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100202321021 - 2² = 12100202321017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100802321021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541481816 + ... + 541504161.

It is an arithmetic number, because the mean of its divisors is an integer number (3025321329543).

Almost surely, 2^{12100202321021} is an apocalyptic number.

It is an amenable number.

12100202321021 is a deficient number, since it is larger than the sum of its proper divisors (1082997151).

12100202321021 is a wasteful number, since it uses less digits than its factorization.

12100202321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082997150.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12100202321021 its reverse (12012320200121), we get a palindrome (24112522521142).

The spelling of 12100202321021 in words is "twelve trillion, one hundred billion, two hundred two million, three hundred twenty-one thousand, twenty-one".