21223200227 has 4 divisors (see below), whose sum is σ = 21232386096. Its totient is φ = 21214014360.

The previous prime is 21223200221. The next prime is 21223200247. The reversal of 21223200227 is 72200232212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21223200227 - 2¹⁰ = 21223199203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223200221) 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, 4589468 + ... + 4594089.

It is an arithmetic number, because the mean of its divisors is an integer number (5308096524).

Almost surely, 2^21223200227 is an apocalyptic number.

21223200227 is a deficient number, since it is larger than the sum of its proper divisors (9185869).

21223200227 is an equidigital number, since it uses as much as digits as its factorization.

21223200227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9185868.

The product of its (nonzero) digits is 1344, while the sum is 23.

Adding to 21223200227 its reverse (72200232212), we get a palindrome (93423432439).

The spelling of 21223200227 in words is "twenty-one billion, two hundred twenty-three million, two hundred thousand, two hundred twenty-seven".