10266500021 has 2 divisors, whose sum is σ = 10266500022. Its totient is φ = 10266500020.

The previous prime is 10266500017. The next prime is 10266500089. The reversal of 10266500021 is 12000566201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9758673796 + 507826225 = 98786^2 + 22535^2 .

It is a cyclic number.

It is not a de Polignac number, because 10266500021 - 2² = 10266500017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10266500021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10266500011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133250010 + 5133250011.

It is an arithmetic number, because the mean of its divisors is an integer number (5133250011).

Almost surely, 2^10266500021 is an apocalyptic number.

It is an amenable number.

10266500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10266500021 is an equidigital number, since it uses as much as digits as its factorization.

10266500021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 10266500021 in words is "ten billion, two hundred sixty-six million, five hundred thousand, twenty-one".