21103011227 has 2 divisors, whose sum is σ = 21103011228. Its totient is φ = 21103011226.

The previous prime is 21103011203. The next prime is 21103011283. The reversal of 21103011227 is 72211030112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103011227 - 2¹⁶ = 21102945691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21103011199 and 21103011208.

It is not a weakly prime, because it can be changed into another prime (21103013227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551505613 + 10551505614.

It is an arithmetic number, because the mean of its divisors is an integer number (10551505614).

Almost surely, 2^21103011227 is an apocalyptic number.

21103011227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103011227 is an equidigital number, since it uses as much as digits as its factorization.

21103011227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 21103011227 its reverse (72211030112), we get a palindrome (93314041339).

The spelling of 21103011227 in words is "twenty-one billion, one hundred three million, eleven thousand, two hundred twenty-seven".