100000010000221 has 2 divisors, whose sum is σ = 100000010000222. Its totient is φ = 100000010000220.

The previous prime is 100000010000201. The next prime is 100000010000243. The reversal of 100000010000221 is 122000010000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84353001303321 + 15647008696900 = 9184389^2 + 3955630^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000010000221 - 2²³ = 100000001611613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100000010000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000005000110 + 50000005000111.

It is an arithmetic number, because the mean of its divisors is an integer number (50000005000111).

Almost surely, 2^{100000010000221} is an apocalyptic number.

It is an amenable number.

100000010000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000010000221 is an equidigital number, since it uses as much as digits as its factorization.

100000010000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100000010000221 its reverse (122000010000001), we get a palindrome (222000020000222).

The spelling of 100000010000221 in words is "one hundred trillion, ten million, two hundred twenty-one", and thus it is an aban number.