12212500529221 has 2 divisors, whose sum is σ = 12212500529222. Its totient is φ = 12212500529220.

The previous prime is 12212500529213. The next prime is 12212500529261. The reversal of 12212500529221 is 12292500521221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12008096172900 + 204404356321 = 3465270^2 + 452111^2 .

It is an emirp because it is prime and its reverse (12292500521221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12212500529221 - 2³ = 12212500529213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212500529261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106250264610 + 6106250264611.

It is an arithmetic number, because the mean of its divisors is an integer number (6106250264611).

Almost surely, 2^{12212500529221} is an apocalyptic number.

It is an amenable number.

12212500529221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212500529221 is an equidigital number, since it uses as much as digits as its factorization.

12212500529221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 12212500529221 in words is "twelve trillion, two hundred twelve billion, five hundred million, five hundred twenty-nine thousand, two hundred twenty-one".