12020020212221 has 8 divisors (see below), whose sum is σ = 14180300342784. Its totient is φ = 9970523678160.

The previous prime is 12020020212173. The next prime is 12020020212223. The reversal of 12020020212221 is 12221202002021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12020020212221 - 2¹⁰ = 12020020211197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020020212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020020212223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27695898890 + ... + 27695899323.

It is an arithmetic number, because the mean of its divisors is an integer number (1772537542848).

Almost surely, 2^{12020020212221} is an apocalyptic number.

It is an amenable number.

12020020212221 is a deficient number, since it is larger than the sum of its proper divisors (2160280130563).

12020020212221 is an equidigital number, since it uses as much as digits as its factorization.

12020020212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55391798251.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12020020212221 its reverse (12221202002021), we get a palindrome (24241222214242).

The spelling of 12020020212221 in words is "twelve trillion, twenty billion, twenty million, two hundred twelve thousand, two hundred twenty-one".