21002000207 has 2 divisors, whose sum is σ = 21002000208. Its totient is φ = 21002000206.

The previous prime is 21002000203. The next prime is 21002000221. The reversal of 21002000207 is 70200020012.

It is an a-pointer prime, because the next prime (21002000221) can be obtained adding 21002000207 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002000207 - 2² = 21002000203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002000191 and 21002000200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002000203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501000103 + 10501000104.

It is an arithmetic number, because the mean of its divisors is an integer number (10501000104).

Almost surely, 2^21002000207 is an apocalyptic number.

21002000207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002000207 is an equidigital number, since it uses as much as digits as its factorization.

21002000207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 14.

Adding to 21002000207 its reverse (70200020012), we get a palindrome (91202020219).

The spelling of 21002000207 in words is "twenty-one billion, two million, two hundred seven", and thus it is an aban number.