100221111020201 has 2 divisors, whose sum is σ = 100221111020202. Its totient is φ = 100221111020200.

The previous prime is 100221111020197. The next prime is 100221111020231. The reversal of 100221111020201 is 102020111122001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65916943155625 + 34304167864576 = 8118925^2 + 5856976^2 .

It is an emirp because it is prime and its reverse (102020111122001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100221111020201 - 2² = 100221111020197 is a prime.

It is not a weakly prime, because it can be changed into another prime (100221111020231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110555510100 + 50110555510101.

It is an arithmetic number, because the mean of its divisors is an integer number (50110555510101).

Almost surely, 2^{100221111020201} is an apocalyptic number.

It is an amenable number.

100221111020201 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221111020201 is an equidigital number, since it uses as much as digits as its factorization.

100221111020201 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 14.

Adding to 100221111020201 its reverse (102020111122001), we get a palindrome (202241222142202).

The spelling of 100221111020201 in words is "one hundred trillion, two hundred twenty-one billion, one hundred eleven million, twenty thousand, two hundred one".