220110222100261 has 2 divisors, whose sum is σ = 220110222100262. Its totient is φ = 220110222100260.

The previous prime is 220110222100247. The next prime is 220110222100283. The reversal of 220110222100261 is 162001222011022.

It is an a-pointer prime, because the next prime (220110222100283) can be obtained adding 220110222100261 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166087501600036 + 54022720500225 = 12887494^2 + 7350015^2 .

It is a cyclic number.

It is not a de Polignac number, because 220110222100261 - 2⁷ = 220110222100133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220110222100291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055111050130 + 110055111050131.

It is an arithmetic number, because the mean of its divisors is an integer number (110055111050131).

Almost surely, 2^{220110222100261} is an apocalyptic number.

It is an amenable number.

220110222100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

220110222100261 is an equidigital number, since it uses as much as digits as its factorization.

220110222100261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 220110222100261 its reverse (162001222011022), we get a palindrome (382111444111283).

The spelling of 220110222100261 in words is "two hundred twenty trillion, one hundred ten billion, two hundred twenty-two million, one hundred thousand, two hundred sixty-one".