21001101001207 has 2 divisors, whose sum is σ = 21001101001208. Its totient is φ = 21001101001206.

The previous prime is 21001101001201. The next prime is 21001101001211. The reversal of 21001101001207 is 70210010110012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001101001207 - 2¹¹ = 21001100999159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001101001201) 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 as a sum of consecutive naturals, namely, 10500550500603 + 10500550500604.

It is an arithmetic number, because the mean of its divisors is an integer number (10500550500604).

Almost surely, 2^{21001101001207} is an apocalyptic number.

21001101001207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001101001207 is an equidigital number, since it uses as much as digits as its factorization.

21001101001207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 21001101001207 its reverse (70210010110012), we get a palindrome (91211111111219).

The spelling of 21001101001207 in words is "twenty-one trillion, one billion, one hundred one million, one thousand, two hundred seven".