21223002201 has 4 divisors (see below), whose sum is σ = 28297336272. Its totient is φ = 14148668132.

The previous prime is 21223002187. The next prime is 21223002257. The reversal of 21223002201 is 10220032212.

It is a happy number.

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 21223002201 - 2¹⁵ = 21222969433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223002601) 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, 3537167031 + ... + 3537167036.

It is an arithmetic number, because the mean of its divisors is an integer number (7074334068).

Almost surely, 2^21223002201 is an apocalyptic number.

It is an amenable number.

21223002201 is a deficient number, since it is larger than the sum of its proper divisors (7074334071).

21223002201 is an equidigital number, since it uses as much as digits as its factorization.

21223002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074334070.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21223002201 its reverse (10220032212), we get a palindrome (31443034413).

The spelling of 21223002201 in words is "twenty-one billion, two hundred twenty-three million, two thousand, two hundred one".