221332054565663 has 2 divisors, whose sum is σ = 221332054565664. Its totient is φ = 221332054565662.

The previous prime is 221332054565621. The next prime is 221332054565681. The reversal of 221332054565663 is 366565450233122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221332054565663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221332054565263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666027282831 + 110666027282832.

It is an arithmetic number, because the mean of its divisors is an integer number (110666027282832).

Almost surely, 2^{221332054565663} is an apocalyptic number.

221332054565663 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332054565663 is an equidigital number, since it uses as much as digits as its factorization.

221332054565663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328000, while the sum is 53.

The spelling of 221332054565663 in words is "two hundred twenty-one trillion, three hundred thirty-two billion, fifty-four million, five hundred sixty-five thousand, six hundred sixty-three".