21110424007 has 2 divisors, whose sum is σ = 21110424008. Its totient is φ = 21110424006.

The previous prime is 21110424001. The next prime is 21110424089. The reversal of 21110424007 is 70042401112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110424007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110424001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555212003 + 10555212004.

It is an arithmetic number, because the mean of its divisors is an integer number (10555212004).

Almost surely, 2^21110424007 is an apocalyptic number.

21110424007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110424007 is an equidigital number, since it uses as much as digits as its factorization.

21110424007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 21110424007 its reverse (70042401112), we get a palindrome (91152825119).

The spelling of 21110424007 in words is "twenty-one billion, one hundred ten million, four hundred twenty-four thousand, seven".