12222020200021 has 4 divisors (see below), whose sum is σ = 12275391467500. Its totient is φ = 12168648932544.

The previous prime is 12222020200003. The next prime is 12222020200037. The reversal of 12222020200021 is 12000202022221.

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 5091277780996 + 7130742419025 = 2256386^2 + 2670345^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222020200021 - 2⁵ = 12222020199989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222020199968 and 12222020200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222020200051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26685633396 + ... + 26685633853.

It is an arithmetic number, because the mean of its divisors is an integer number (3068847866875).

Almost surely, 2^{12222020200021} is an apocalyptic number.

It is an amenable number.

12222020200021 is a deficient number, since it is larger than the sum of its proper divisors (53371267479).

12222020200021 is an equidigital number, since it uses as much as digits as its factorization.

12222020200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53371267478.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12222020200021 its reverse (12000202022221), we get a palindrome (24222222222242).

The spelling of 12222020200021 in words is "twelve trillion, two hundred twenty-two billion, twenty million, two hundred thousand, twenty-one".