21267107 has 2 divisors, whose sum is σ = 21267108. Its totient is φ = 21267106.

The previous prime is 21267091. The next prime is 21267133. The reversal of 21267107 is 70176212.

It is an a-pointer prime, because the next prime (21267133) can be obtained adding 21267107 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21267107 - 2⁴ = 21267091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21207107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10633553 + 10633554.

It is an arithmetic number, because the mean of its divisors is an integer number (10633554).

Almost surely, 2^21267107 is an apocalyptic number.

21267107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21267107 is an equidigital number, since it uses as much as digits as its factorization.

21267107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 21267107 is about 4611.6273700289. The cubic root of 21267107 is about 277.0572199083.

The spelling of 21267107 in words is "twenty-one million, two hundred sixty-seven thousand, one hundred seven".