21002102000007 has 4 divisors (see below), whose sum is σ = 28002802666680. Its totient is φ = 14001401333336.

The previous prime is 21002101999993. The next prime is 21002102000017. The reversal of 21002102000007 is 70000020120012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21002102000007 - 2⁶ = 21002101999943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21002102000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002102000017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3500350333332 + ... + 3500350333337.

It is an arithmetic number, because the mean of its divisors is an integer number (7000700666670).

Almost surely, 2^{21002102000007} is an apocalyptic number.

21002102000007 is a deficient number, since it is larger than the sum of its proper divisors (7000700666673).

21002102000007 is an equidigital number, since it uses as much as digits as its factorization.

21002102000007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000700666672.

The product of its (nonzero) digits is 56, while the sum is 15.

Adding to 21002102000007 its reverse (70000020120012), we get a palindrome (91002122120019).

The spelling of 21002102000007 in words is "twenty-one trillion, two billion, one hundred two million, seven", and thus it is an aban number.