221432217601603 has 2 divisors, whose sum is σ = 221432217601604. Its totient is φ = 221432217601602.

The previous prime is 221432217601589. The next prime is 221432217601649. The reversal of 221432217601603 is 306106712234122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221432217601603 is a prime.

It is a super-2 number, since 2×221432217601603² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221432217601663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110716108800801 + 110716108800802.

It is an arithmetic number, because the mean of its divisors is an integer number (110716108800802).

Almost surely, 2^{221432217601603} is an apocalyptic number.

221432217601603 is a deficient number, since it is larger than the sum of its proper divisors (1).

221432217601603 is an equidigital number, since it uses as much as digits as its factorization.

221432217601603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

Adding to 221432217601603 its reverse (306106712234122), we get a palindrome (527538929835725).

The spelling of 221432217601603 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred seventeen million, six hundred one thousand, six hundred three".