20201201222221 has 8 divisors (see below), whose sum is σ = 21264481776320. Its totient is φ = 19137926611872.

The previous prime is 20201201222177. The next prime is 20201201222227. The reversal of 20201201222221 is 12222210210202.

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 20201201222221 - 2¹⁹ = 20201200697933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201201222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6625936 + ... + 9181798.

It is an arithmetic number, because the mean of its divisors is an integer number (2658060222040).

Almost surely, 2^{20201201222221} is an apocalyptic number.

It is an amenable number.

20201201222221 is a deficient number, since it is larger than the sum of its proper divisors (1063280554099).

20201201222221 is a wasteful number, since it uses less digits than its factorization.

20201201222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971875.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20201201222221 its reverse (12222210210202), we get a palindrome (32423411432423).

The spelling of 20201201222221 in words is "twenty trillion, two hundred one billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty-one".