21224200201 has 4 divisors (see below), whose sum is σ = 21237409152. Its totient is φ = 21210991252.

The previous prime is 21224200183. The next prime is 21224200223. The reversal of 21224200201 is 10200242212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21224200201 - 2¹¹ = 21224198153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21224200271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6602065 + ... + 6605278.

It is an arithmetic number, because the mean of its divisors is an integer number (5309352288).

Almost surely, 2^21224200201 is an apocalyptic number.

It is an amenable number.

21224200201 is a deficient number, since it is larger than the sum of its proper divisors (13208951).

21224200201 is a wasteful number, since it uses less digits than its factorization.

21224200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13208950.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21224200201 its reverse (10200242212), we get a palindrome (31424442413).

The spelling of 21224200201 in words is "twenty-one billion, two hundred twenty-four million, two hundred thousand, two hundred one".