21210220200201 has 8 divisors (see below), whose sum is σ = 28364211386784. Its totient is φ = 14098187906880.

The previous prime is 21210220200193. The next prime is 21210220200233. The reversal of 21210220200201 is 10200202201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21210220200201 - 2³ = 21210220200193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210220280201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10489722135 + ... + 10489724156.

It is an arithmetic number, because the mean of its divisors is an integer number (3545526423348).

Almost surely, 2^{21210220200201} is an apocalyptic number.

It is an amenable number.

21210220200201 is a deficient number, since it is larger than the sum of its proper divisors (7153991186583).

21210220200201 is a wasteful number, since it uses less digits than its factorization.

21210220200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20979446631.

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

Adding to 21210220200201 its reverse (10200202201212), we get a palindrome (31410422401413).

The spelling of 21210220200201 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred thousand, two hundred one".