221211212100071 has 2 divisors, whose sum is σ = 221211212100072. Its totient is φ = 221211212100070.

The previous prime is 221211212100007. The next prime is 221211212100119. The reversal of 221211212100071 is 170001212112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211212100071 - 2⁶ = 221211212100007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211212100271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605606050035 + 110605606050036.

It is an arithmetic number, because the mean of its divisors is an integer number (110605606050036).

Almost surely, 2^{221211212100071} is an apocalyptic number.

221211212100071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211212100071 is an equidigital number, since it uses as much as digits as its factorization.

221211212100071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 221211212100071 its reverse (170001212112122), we get a palindrome (391212424212193).

The spelling of 221211212100071 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twelve million, one hundred thousand, seventy-one".