221421327266663 has 2 divisors, whose sum is σ = 221421327266664. Its totient is φ = 221421327266662.

The previous prime is 221421327266617. The next prime is 221421327266669. The reversal of 221421327266663 is 366662723124122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221421327266663 - 2¹² = 221421327262567 is a prime.

It is a super-2 number, since 2×221421327266663² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221421327266669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710663633331 + 110710663633332.

It is an arithmetic number, because the mean of its divisors is an integer number (110710663633332).

Almost surely, 2^{221421327266663} is an apocalyptic number.

221421327266663 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421327266663 is an equidigital number, since it uses as much as digits as its factorization.

221421327266663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 53.

The spelling of 221421327266663 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred twenty-seven million, two hundred sixty-six thousand, six hundred sixty-three".