221421203532241 has 2 divisors, whose sum is σ = 221421203532242. Its totient is φ = 221421203532240.

The previous prime is 221421203532203. The next prime is 221421203532299. The reversal of 221421203532241 is 142235302124122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168305968011841 + 53115235520400 = 12973279^2 + 7288020^2 .

It is a cyclic number.

It is not a de Polignac number, because 221421203532241 - 2¹³ = 221421203524049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221421203532197 and 221421203532206.

It is not a weakly prime, because it can be changed into another prime (221421203512241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710601766120 + 110710601766121.

It is an arithmetic number, because the mean of its divisors is an integer number (110710601766121).

Almost surely, 2^{221421203532241} is an apocalyptic number.

It is an amenable number.

221421203532241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421203532241 is an equidigital number, since it uses as much as digits as its factorization.

221421203532241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 221421203532241 its reverse (142235302124122), we get a palindrome (363656505656363).

The spelling of 221421203532241 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred thirty-two thousand, two hundred forty-one".