21234201227 has 8 divisors (see below), whose sum is σ = 21976361232.
Its totient is φ = 20502720000.
The previous prime is 21234201221. The next prime is 21234201269. The reversal of 21234201227 is 72210243212.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 21234201227 - 28 = 21234200971 is a prime.
It is a super-4 number, since 4×212342012274 (a number of 42 digits) contains 4444 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 21234201196 and 21234201205.
It is not an unprimeable number, because it can be changed into a prime (21234201221) 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, 2665649 + ... + 2673602.
It is an arithmetic number, because the mean of its divisors is an integer number (2747045154).
Almost surely, 221234201227 is an apocalyptic number.
21234201227 is a deficient number, since it is larger than the sum of its proper divisors (742160005).
21234201227 is an equidigital number, since it uses as much as digits as its factorization.
21234201227 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5339389.
The product of its (nonzero) digits is 2688, while the sum is 26.
Adding to 21234201227 its reverse (72210243212), we get a palindrome (93444444439).
The spelling of 21234201227 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, two hundred twenty-seven".