21333333227 has 2 divisors, whose sum is σ = 21333333228. Its totient is φ = 21333333226.

The previous prime is 21333333199. The next prime is 21333333317. The reversal of 21333333227 is 72233333312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21333333227 - 2⁸ = 21333332971 is a prime.

It is a super-2 number, since 2×21333333227² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21333333193 and 21333333202.

It is not a weakly prime, because it can be changed into another prime (21333332227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666666613 + 10666666614.

It is an arithmetic number, because the mean of its divisors is an integer number (10666666614).

Almost surely, 2^21333333227 is an apocalyptic number.

21333333227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333333227 is an equidigital number, since it uses as much as digits as its factorization.

21333333227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 32.

Adding to 21333333227 its reverse (72233333312), we get a palindrome (93566666539).

The spelling of 21333333227 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, two hundred twenty-seven".