20012200221 has 16 divisors (see below), whose sum is σ = 28989769536. Its totient is φ = 12206213376.

The previous prime is 20012200207. The next prime is 20012200223. The reversal of 20012200221 is 12200221002.

It is not a de Polignac number, because 20012200221 - 2⁹ = 20012199709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20012200197 and 20012200206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012200223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266095 + ... + 2274908.

It is an arithmetic number, because the mean of its divisors is an integer number (1811860596).

Almost surely, 2^20012200221 is an apocalyptic number.

It is an amenable number.

20012200221 is a deficient number, since it is larger than the sum of its proper divisors (8977569315).

20012200221 is a wasteful number, since it uses less digits than its factorization.

20012200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541132.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20012200221 its reverse (12200221002), we get a palindrome (32212421223).

The spelling of 20012200221 in words is "twenty billion, twelve million, two hundred thousand, two hundred twenty-one".