221001123211 has 8 divisors (see below), whose sum is σ = 241436068848. Its totient is φ = 200623500000.

The previous prime is 221001123169. The next prime is 221001123229. The reversal of 221001123211 is 112321100122.

221001123211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221001123211 - 2¹¹ = 221001121163 is a prime.

It is a super-4 number, since 4×221001123211⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001123271) 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 in 7 ways as a sum of consecutive naturals, for example, 14322540 + ... + 14337961.

It is an arithmetic number, because the mean of its divisors is an integer number (30179508606).

Almost surely, 2^221001123211 is an apocalyptic number.

221001123211 is a deficient number, since it is larger than the sum of its proper divisors (20434945637).

221001123211 is a wasteful number, since it uses less digits than its factorization.

221001123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28661213.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221001123211 its reverse (112321100122), we get a palindrome (333322223333).

The spelling of 221001123211 in words is "two hundred twenty-one billion, one million, one hundred twenty-three thousand, two hundred eleven".