21140107 has 2 divisors, whose sum is σ = 21140108. Its totient is φ = 21140106.

The previous prime is 21140089. The next prime is 21140123. The reversal of 21140107 is 70104112.

It is an a-pointer prime, because the next prime (21140123) can be obtained adding 21140107 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140107 - 2¹¹ = 21138059 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570053 + 10570054.

It is an arithmetic number, because the mean of its divisors is an integer number (10570054).

Almost surely, 2^21140107 is an apocalyptic number.

21140107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140107 is an equidigital number, since it uses as much as digits as its factorization.

21140107 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 16.

The square root of 21140107 is about 4597.8372089494. The cubic root of 21140107 is about 276.5046209989.

Adding to 21140107 its reverse (70104112), we get a palindrome (91244219).

The spelling of 21140107 in words is "twenty-one million, one hundred forty thousand, one hundred seven".