201211210850077 has 2 divisors, whose sum is σ = 201211210850078. Its totient is φ = 201211210850076.

The previous prime is 201211210850011. The next prime is 201211210850087. The reversal of 201211210850077 is 770058012112102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180228315907396 + 20982894942681 = 13424914^2 + 4580709^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211210850077 - 2³¹ = 201209063366429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211210850087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605605425038 + 100605605425039.

It is an arithmetic number, because the mean of its divisors is an integer number (100605605425039).

Almost surely, 2^{201211210850077} is an apocalyptic number.

It is an amenable number.

201211210850077 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211210850077 is an equidigital number, since it uses as much as digits as its factorization.

201211210850077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 37.

Adding to 201211210850077 its reverse (770058012112102), we get a palindrome (971269222962179).

The spelling of 201211210850077 in words is "two hundred one trillion, two hundred eleven billion, two hundred ten million, eight hundred fifty thousand, seventy-seven".