220000001100221 has 2 divisors, whose sum is σ = 220000001100222. Its totient is φ = 220000001100220.

The previous prime is 220000001100167. The next prime is 220000001100227. The reversal of 220000001100221 is 122001100000022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194591647051321 + 25408354048900 = 13949611^2 + 5040670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220000001100221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220000001100227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000000550110 + 110000000550111.

It is an arithmetic number, because the mean of its divisors is an integer number (110000000550111).

Almost surely, 2^{220000001100221} is an apocalyptic number.

It is an amenable number.

220000001100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000001100221 is an equidigital number, since it uses as much as digits as its factorization.

220000001100221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220000001100221 its reverse (122001100000022), we get a palindrome (342001101100243).

The spelling of 220000001100221 in words is "two hundred twenty trillion, one million, one hundred thousand, two hundred twenty-one".