221122221123 has 16 divisors (see below), whose sum is σ = 301392599040. Its totient is φ = 144139370496.

The previous prime is 221122221113. The next prime is 221122221149. The reversal of 221122221123 is 321122221122.

It is not a de Polignac number, because 221122221123 - 2⁵ = 221122221091 is a prime.

It is a super-3 number, since 3×221122221123³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 221122221123.

It is not an unprimeable number, because it can be changed into a prime (221122221113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608190 + ... + 901187.

It is an arithmetic number, because the mean of its divisors is an integer number (18837037440).

Almost surely, 2^221122221123 is an apocalyptic number.

221122221123 is a deficient number, since it is larger than the sum of its proper divisors (80270377917).

221122221123 is a wasteful number, since it uses less digits than its factorization.

221122221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510466.

The product of its digits is 384, while the sum is 21.

Adding to 221122221123 its reverse (321122221122), we get a palindrome (542244442245).

Subtracting 221122221123 from its reverse (321122221122), we obtain a palindrome (99999999999).

The spelling of 221122221123 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-three".