221163634403 has 8 divisors (see below), whose sum is σ = 222457090176. Its totient is φ = 219870352000.

The previous prime is 221163634399. The next prime is 221163634423. The reversal of 221163634403 is 304436361122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221163634403 - 2² = 221163634399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221163634423) 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 7 ways as a sum of consecutive naturals, for example, 3237803 + ... + 3305403.

It is an arithmetic number, because the mean of its divisors is an integer number (27807136272).

Almost surely, 2^221163634403 is an apocalyptic number.

221163634403 is a deficient number, since it is larger than the sum of its proper divisors (1293455773).

221163634403 is a wasteful number, since it uses less digits than its factorization.

221163634403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86685.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 221163634403 its reverse (304436361122), we get a palindrome (525599995525).

The spelling of 221163634403 in words is "two hundred twenty-one billion, one hundred sixty-three million, six hundred thirty-four thousand, four hundred three".