221113101211 has 4 divisors (see below), whose sum is σ = 222062084712. Its totient is φ = 220164117712.

The previous prime is 221113101151. The next prime is 221113101233. The reversal of 221113101211 is 112101311122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221113101211 - 2³⁵ = 186753362843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221113101511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474491401 + ... + 474491866.

It is an arithmetic number, because the mean of its divisors is an integer number (55515521178).

Almost surely, 2^221113101211 is an apocalyptic number.

221113101211 is a deficient number, since it is larger than the sum of its proper divisors (948983501).

221113101211 is an equidigital number, since it uses as much as digits as its factorization.

221113101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948983500.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 221113101211 its reverse (112101311122), we get a palindrome (333214412333).

The spelling of 221113101211 in words is "two hundred twenty-one billion, one hundred thirteen million, one hundred one thousand, two hundred eleven".