201122101 has 2 divisors, whose sum is σ = 201122102. Its totient is φ = 201122100.

The previous prime is 201122093. The next prime is 201122161. The reversal of 201122101 is 101221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105062500 + 96059601 = 10250^2 + 9801^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122101 - 2³ = 201122093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201122161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561050 + 100561051.

It is an arithmetic number, because the mean of its divisors is an integer number (100561051).

Almost surely, 2^201122101 is an apocalyptic number.

It is an amenable number.

201122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122101 is an equidigital number, since it uses as much as digits as its factorization.

201122101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 201122101 is about 14181.7523952437. The cubic root of 201122101 is about 585.8951897024.

Adding to 201122101 its reverse (101221102), we get a palindrome (302343203).

Subtracting from 201122101 its reverse (101221102), we obtain a palindrome (99900999).

The spelling of 201122101 in words is "two hundred one million, one hundred twenty-two thousand, one hundred one".