12221020200021 has 4 divisors (see below), whose sum is σ = 16294693600032. Its totient is φ = 8147346800012.

The previous prime is 12221020200013. The next prime is 12221020200049. The reversal of 12221020200021 is 12000202012221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12221020200021 - 2³ = 12221020200013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221020200421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036836700001 + ... + 2036836700006.

It is an arithmetic number, because the mean of its divisors is an integer number (4073673400008).

Almost surely, 2^{12221020200021} is an apocalyptic number.

It is an amenable number.

12221020200021 is a deficient number, since it is larger than the sum of its proper divisors (4073673400011).

12221020200021 is an equidigital number, since it uses as much as digits as its factorization.

12221020200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073673400010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12221020200021 its reverse (12000202012221), we get a palindrome (24221222212242).

The spelling of 12221020200021 in words is "twelve trillion, two hundred twenty-one billion, twenty million, two hundred thousand, twenty-one".