221212453536241 has 2 divisors, whose sum is σ = 221212453536242. Its totient is φ = 221212453536240.

The previous prime is 221212453536197. The next prime is 221212453536251. The reversal of 221212453536241 is 142635354212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217094557388641 + 4117896147600 = 14734129^2 + 2029260^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212453536241 - 2²⁹ = 221211916665329 is a prime.

It is not a weakly prime, because it can be changed into another prime (221212453536251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606226768120 + 110606226768121.

It is an arithmetic number, because the mean of its divisors is an integer number (110606226768121).

Almost surely, 2^{221212453536241} is an apocalyptic number.

It is an amenable number.

221212453536241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212453536241 is an equidigital number, since it uses as much as digits as its factorization.

221212453536241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 43.

The spelling of 221212453536241 in words is "two hundred twenty-one trillion, two hundred twelve billion, four hundred fifty-three million, five hundred thirty-six thousand, two hundred forty-one".