21221020200201 has 32 divisors (see below), whose sum is σ = 28465018306560. Its totient is φ = 14062508241600.

The previous prime is 21221020200173. The next prime is 21221020200223. The reversal of 21221020200201 is 10200202012212.

It is not a de Polignac number, because 21221020200201 - 2¹⁴ = 21221020183817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221020200271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459495331 + ... + 459541511.

It is an arithmetic number, because the mean of its divisors is an integer number (889531822080).

Almost surely, 2^{21221020200201} is an apocalyptic number.

It is an amenable number.

21221020200201 is a deficient number, since it is larger than the sum of its proper divisors (7243998106359).

21221020200201 is a wasteful number, since it uses less digits than its factorization.

21221020200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47917.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21221020200201 its reverse (10200202012212), we get a palindrome (31421222212413).

The spelling of 21221020200201 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thousand, two hundred one".