221331211123 has 6 divisors (see below), whose sum is σ = 243281414012. Its totient is φ = 201210191820.

The previous prime is 221331211093. The next prime is 221331211139. The reversal of 221331211123 is 321112133122.

221331211123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221331211123 - 2¹³ = 221331202931 is a prime.

It is a super-2 number, since 2×221331211123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221331211094 and 221331211103.

It is not an unprimeable number, because it can be changed into a prime (221331217123) 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 5 ways as a sum of consecutive naturals, for example, 914591661 + ... + 914591902.

Almost surely, 2^221331211123 is an apocalyptic number.

221331211123 is a deficient number, since it is larger than the sum of its proper divisors (21950202889).

221331211123 is a wasteful number, since it uses less digits than its factorization.

221331211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829183585 (or 1829183574 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 221331211123 its reverse (321112133122), we get a palindrome (542443344245).

The spelling of 221331211123 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred eleven thousand, one hundred twenty-three".