221221202020241 has 2 divisors, whose sum is σ = 221221202020242. Its totient is φ = 221221202020240.

The previous prime is 221221202020229. The next prime is 221221202020267. The reversal of 221221202020241 is 142020202122122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180341290832641 + 40879911187600 = 13429121^2 + 6393740^2 .

It is a cyclic number.

It is not a de Polignac number, because 221221202020241 - 2²² = 221221197825937 is a prime.

It is not a weakly prime, because it can be changed into another prime (221221202020141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610601010120 + 110610601010121.

It is an arithmetic number, because the mean of its divisors is an integer number (110610601010121).

Almost surely, 2^{221221202020241} is an apocalyptic number.

It is an amenable number.

221221202020241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221202020241 is an equidigital number, since it uses as much as digits as its factorization.

221221202020241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221221202020241 its reverse (142020202122122), we get a palindrome (363241404142363).

The spelling of 221221202020241 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, twenty thousand, two hundred forty-one".