211200221021077 has 2 divisors, whose sum is σ = 211200221021078. Its totient is φ = 211200221021076.

The previous prime is 211200221021039. The next prime is 211200221021093. The reversal of 211200221021077 is 770120122002112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121014828454276 + 90185392566801 = 11000674^2 + 9496599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211200221021077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200221021677) 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 as a sum of consecutive naturals, namely, 105600110510538 + 105600110510539.

It is an arithmetic number, because the mean of its divisors is an integer number (105600110510539).

Almost surely, 2^{211200221021077} is an apocalyptic number.

It is an amenable number.

211200221021077 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200221021077 is an equidigital number, since it uses as much as digits as its factorization.

211200221021077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

Adding to 211200221021077 its reverse (770120122002112), we get a palindrome (981320343023189).

The spelling of 211200221021077 in words is "two hundred eleven trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, seventy-seven".