201101110020121 has 4 divisors (see below), whose sum is σ = 201102018241572. Its totient is φ = 201100201798672.

The previous prime is 201101110020079. The next prime is 201101110020127. The reversal of 201101110020121 is 121020011101102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14232510760000 + 186868599260121 = 3772600^2 + 13669989^2 .

It is a cyclic number.

It is not a de Polignac number, because 201101110020121 - 2²³ = 201101101631513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201101110020127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453778510 + ... + 454221463.

It is an arithmetic number, because the mean of its divisors is an integer number (50275504560393).

Almost surely, 2^{201101110020121} is an apocalyptic number.

It is an amenable number.

201101110020121 is a deficient number, since it is larger than the sum of its proper divisors (908221451).

201101110020121 is an equidigital number, since it uses as much as digits as its factorization.

201101110020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908221450.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201101110020121 its reverse (121020011101102), we get a palindrome (322121121121223).

The spelling of 201101110020121 in words is "two hundred one trillion, one hundred one billion, one hundred ten million, twenty thousand, one hundred twenty-one".