221101022005 has 24 divisors (see below), whose sum is σ = 283394395872. Its totient is φ = 165552257376.

The previous prime is 221101022003. The next prime is 221101022011. The reversal of 221101022005 is 500220101122.

It is a happy number.

It is not a de Polignac number, because 221101022005 - 2¹ = 221101022003 is a prime.

It is a super-4 number, since 4×221101022005⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221101022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101022003) 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 23 ways as a sum of consecutive naturals, for example, 588099 + ... + 887728.

It is an arithmetic number, because the mean of its divisors is an integer number (11808099828).

Almost surely, 2^221101022005 is an apocalyptic number.

It is an amenable number.

221101022005 is a deficient number, since it is larger than the sum of its proper divisors (62293373867).

221101022005 is a wasteful number, since it uses less digits than its factorization.

221101022005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475953 (or 1475934 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 221101022005 its reverse (500220101122), we get a palindrome (721321123127).

The spelling of 221101022005 in words is "two hundred twenty-one billion, one hundred one million, twenty-two thousand, five".