221123130112 has 72 divisors (see below), whose sum is σ = 444237073280. Its totient is φ = 109847715840.

The previous prime is 221123130061. The next prime is 221123130127. The reversal of 221123130112 is 211031321122.

It is a super-2 number, since 2×221123130112² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221123130112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81503668 + ... + 81506380.

Almost surely, 2^221123130112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221123130112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222118536640).

221123130112 is an abundant number, since it is smaller than the sum of its proper divisors (223113943168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221123130112 is a wasteful number, since it uses less digits than its factorization.

221123130112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669 (or 4655 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221123130112 its reverse (211031321122), we get a palindrome (432154451234).

The spelling of 221123130112 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thirty thousand, one hundred twelve".