20221000200221 has 16 divisors (see below), whose sum is σ = 21766979949120. Its totient is φ = 18714790798080.

The previous prime is 20221000200169. The next prime is 20221000200223. The reversal of 20221000200221 is 12200200012202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221000200221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221000200196 and 20221000200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221000200223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1622870 + ... + 6563208.

It is an arithmetic number, because the mean of its divisors is an integer number (1360436246820).

Almost surely, 2^{20221000200221} is an apocalyptic number.

It is an amenable number.

20221000200221 is a deficient number, since it is larger than the sum of its proper divisors (1545979748899).

20221000200221 is a wasteful number, since it uses less digits than its factorization.

20221000200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944364.

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

Adding to 20221000200221 its reverse (12200200012202), we get a palindrome (32421200212423).

The spelling of 20221000200221 in words is "twenty trillion, two hundred twenty-one billion, two hundred thousand, two hundred twenty-one".