201122166677 has 2 divisors, whose sum is σ = 201122166678. Its totient is φ = 201122166676.

The previous prime is 201122166673. The next prime is 201122166691. The reversal of 201122166677 is 776661221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177320156836 + 23802009841 = 421094^2 + 154279^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122166677 - 2² = 201122166673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201122166673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561083338 + 100561083339.

It is an arithmetic number, because the mean of its divisors is an integer number (100561083339).

Almost surely, 2^201122166677 is an apocalyptic number.

It is an amenable number.

201122166677 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122166677 is an equidigital number, since it uses as much as digits as its factorization.

201122166677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

Adding to 201122166677 its reverse (776661221102), we get a palindrome (977783387779).

The spelling of 201122166677 in words is "two hundred one billion, one hundred twenty-two million, one hundred sixty-six thousand, six hundred seventy-seven".