21411107 has 2 divisors, whose sum is σ = 21411108. Its totient is φ = 21411106.

The previous prime is 21411083. The next prime is 21411149. The reversal of 21411107 is 70111412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21411107 - 2¹² = 21407011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21411407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705553 + 10705554.

It is an arithmetic number, because the mean of its divisors is an integer number (10705554).

Almost surely, 2^21411107 is an apocalyptic number.

21411107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411107 is an equidigital number, since it uses as much as digits as its factorization.

21411107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 21411107 is about 4627.2137404706. The cubic root of 21411107 is about 277.6811338049.

Adding to 21411107 its reverse (70111412), we get a palindrome (91522519).

The spelling of 21411107 in words is "twenty-one million, four hundred eleven thousand, one hundred seven".