20012220000221 has 4 divisors (see below), whose sum is σ = 20012437278912. Its totient is φ = 20012002721532.

The previous prime is 20012220000217. The next prime is 20012220000239. The reversal of 20012220000221 is 12200002221002.

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 20012220000221 - 2² = 20012220000217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012220000196 and 20012220000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220000281) 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, 108501131 + ... + 108685416.

It is an arithmetic number, because the mean of its divisors is an integer number (5003109319728).

Almost surely, 2^{20012220000221} is an apocalyptic number.

It is an amenable number.

20012220000221 is a deficient number, since it is larger than the sum of its proper divisors (217278691).

20012220000221 is an equidigital number, since it uses as much as digits as its factorization.

20012220000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217278690.

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

Adding to 20012220000221 its reverse (12200002221002), we get a palindrome (32212222221223).

The spelling of 20012220000221 in words is "twenty trillion, twelve billion, two hundred twenty million, two hundred twenty-one", and thus it is an aban number.