2001222011177 has 2 divisors, whose sum is σ = 2001222011178. Its totient is φ = 2001222011176.

The previous prime is 2001222011081. The next prime is 2001222011189. The reversal of 2001222011177 is 7711102221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1825171278121 + 176050733056 = 1350989^2 + 419584^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001222011177 - 2¹⁶ = 2001221945641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001222011197) 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, 1000611005588 + 1000611005589.

It is an arithmetic number, because the mean of its divisors is an integer number (1000611005589).

Almost surely, 2^{2001222011177} is an apocalyptic number.

It is an amenable number.

2001222011177 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001222011177 is an equidigital number, since it uses as much as digits as its factorization.

2001222011177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 2001222011177 its reverse (7711102221002), we get a palindrome (9712324232179).

The spelling of 2001222011177 in words is "two trillion, one billion, two hundred twenty-two million, eleven thousand, one hundred seventy-seven".