201044320121 has 2 divisors, whose sum is σ = 201044320122. Its totient is φ = 201044320120.

The previous prime is 201044320097. The next prime is 201044320231. The reversal of 201044320121 is 121023440102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200207028025 + 837292096 = 447445^2 + 28936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201044320121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201044320093 and 201044320102.

It is not a weakly prime, because it can be changed into another prime (201044322121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100522160060 + 100522160061.

It is an arithmetic number, because the mean of its divisors is an integer number (100522160061).

Almost surely, 2^201044320121 is an apocalyptic number.

It is an amenable number.

201044320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201044320121 is an equidigital number, since it uses as much as digits as its factorization.

201044320121 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 20.

Adding to 201044320121 its reverse (121023440102), we get a palindrome (322067760223).

The spelling of 201044320121 in words is "two hundred one billion, forty-four million, three hundred twenty thousand, one hundred twenty-one".