10000220261 has 2 divisors, whose sum is σ = 10000220262. Its totient is φ = 10000220260.

The previous prime is 10000220179. The next prime is 10000220297. The reversal of 10000220261 is 16202200001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8557360036 + 1442860225 = 92506^2 + 37985^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000220261 - 2¹⁸ = 9999958117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000220561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000110130 + 5000110131.

It is an arithmetic number, because the mean of its divisors is an integer number (5000110131).

Almost surely, 2^10000220261 is an apocalyptic number.

It is an amenable number.

10000220261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000220261 is an equidigital number, since it uses as much as digits as its factorization.

10000220261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10000220261 its reverse (16202200001), we get a palindrome (26202420262).

The spelling of 10000220261 in words is "ten billion, two hundred twenty thousand, two hundred sixty-one".