21116707 has 2 divisors, whose sum is σ = 21116708. Its totient is φ = 21116706.

The previous prime is 21116701. The next prime is 21116713. The reversal of 21116707 is 70761112.

It is a balanced prime because it is at equal distance from previous prime (21116701) and next prime (21116713).

It is a cyclic number.

It is not a de Polignac number, because 21116707 - 2³ = 21116699 is a prime.

It is not a weakly prime, because it can be changed into another prime (21116701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10558353 + 10558354.

It is an arithmetic number, because the mean of its divisors is an integer number (10558354).

Almost surely, 2^21116707 is an apocalyptic number.

21116707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21116707 is an equidigital number, since it uses as much as digits as its factorization.

21116707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 21116707 is about 4595.2918296883. The cubic root of 21116707 is about 276.4025622772.

Adding to 21116707 its reverse (70761112), we get a palindrome (91877819).

The spelling of 21116707 in words is "twenty-one million, one hundred sixteen thousand, seven hundred seven".