21210003675607 has 2 divisors, whose sum is σ = 21210003675608. Its totient is φ = 21210003675606.

The previous prime is 21210003675559. The next prime is 21210003675611. The reversal of 21210003675607 is 70657630001212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210003675607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210003675607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210003675617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605001837803 + 10605001837804.

It is an arithmetic number, because the mean of its divisors is an integer number (10605001837804).

Almost surely, 2^{21210003675607} is an apocalyptic number.

21210003675607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210003675607 is an equidigital number, since it uses as much as digits as its factorization.

21210003675607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

Adding to 21210003675607 its reverse (70657630001212), we get a palindrome (91867633676819).

The spelling of 21210003675607 in words is "twenty-one trillion, two hundred ten billion, three million, six hundred seventy-five thousand, six hundred seven".