12020002220021 has 4 divisors (see below), whose sum is σ = 12020432779200. Its totient is φ = 12019571660844.

The previous prime is 12020002219999. The next prime is 12020002220047. The reversal of 12020002220021 is 12002220002021.

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 12020002220021 - 2⁶ = 12020002219957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020002219978 and 12020002220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020002220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215237711 + ... + 215293548.

It is an arithmetic number, because the mean of its divisors is an integer number (3005108194800).

Almost surely, 2^{12020002220021} is an apocalyptic number.

It is an amenable number.

12020002220021 is a deficient number, since it is larger than the sum of its proper divisors (430559179).

12020002220021 is an equidigital number, since it uses as much as digits as its factorization.

12020002220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430559178.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12020002220021 its reverse (12002220002021), we get a palindrome (24022222222042).

The spelling of 12020002220021 in words is "twelve trillion, twenty billion, two million, two hundred twenty thousand, twenty-one".