21213233227 has 2 divisors, whose sum is σ = 21213233228. Its totient is φ = 21213233226.

The previous prime is 21213233177. The next prime is 21213233317. The reversal of 21213233227 is 72233231212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213233227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213233195 and 21213233204.

It is not a weakly prime, because it can be changed into another prime (21217233227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606616613 + 10606616614.

It is an arithmetic number, because the mean of its divisors is an integer number (10606616614).

Almost surely, 2^21213233227 is an apocalyptic number.

21213233227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213233227 is an equidigital number, since it uses as much as digits as its factorization.

21213233227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 28.

Adding to 21213233227 its reverse (72233231212), we get a palindrome (93446464439).

The spelling of 21213233227 in words is "twenty-one billion, two hundred thirteen million, two hundred thirty-three thousand, two hundred twenty-seven".