221421327521363 has 16 divisors (see below), whose sum is σ = 225269454421440. Its totient is φ = 217606807520256.

The previous prime is 221421327521351. The next prime is 221421327521369. The reversal of 221421327521363 is 363125723124122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221421327521363 - 2¹⁰ = 221421327520339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221421327521369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45507131 + ... + 50137227.

It is an arithmetic number, because the mean of its divisors is an integer number (14079340901340).

Almost surely, 2^{221421327521363} is an apocalyptic number.

221421327521363 is a deficient number, since it is larger than the sum of its proper divisors (3848126900077).

221421327521363 is a wasteful number, since it uses less digits than its factorization.

221421327521363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633726.

The product of its digits is 725760, while the sum is 44.

The spelling of 221421327521363 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred twenty-seven million, five hundred twenty-one thousand, three hundred sixty-three".