221415505540241 has 2 divisors, whose sum is σ = 221415505540242. Its totient is φ = 221415505540240.

The previous prime is 221415505540231. The next prime is 221415505540279. The reversal of 221415505540241 is 142045505514122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207162162410641 + 14253343129600 = 14393129^2 + 3775360^2 .

It is a cyclic number.

It is not a de Polignac number, because 221415505540241 - 2⁴⁶ = 151046761362577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221415505540231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110707752770120 + 110707752770121.

It is an arithmetic number, because the mean of its divisors is an integer number (110707752770121).

Almost surely, 2^{221415505540241} is an apocalyptic number.

It is an amenable number.

221415505540241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221415505540241 is an equidigital number, since it uses as much as digits as its factorization.

221415505540241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320000, while the sum is 41.

The spelling of 221415505540241 in words is "two hundred twenty-one trillion, four hundred fifteen billion, five hundred five million, five hundred forty thousand, two hundred forty-one".