201121012177 has 2 divisors, whose sum is σ = 201121012178. Its totient is φ = 201121012176.

The previous prime is 201121012133. The next prime is 201121012229. The reversal of 201121012177 is 771210121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200855452561 + 265559616 = 448169^2 + 16296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121012177 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121015177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560506088 + 100560506089.

It is an arithmetic number, because the mean of its divisors is an integer number (100560506089).

Almost surely, 2^201121012177 is an apocalyptic number.

It is an amenable number.

201121012177 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121012177 is an equidigital number, since it uses as much as digits as its factorization.

201121012177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 25.

Adding to 201121012177 its reverse (771210121102), we get a palindrome (972331133279).

The spelling of 201121012177 in words is "two hundred one billion, one hundred twenty-one million, twelve thousand, one hundred seventy-seven".