221022112112 has 60 divisors (see below), whose sum is σ = 446628576888. Its totient is φ = 105945897600.

The previous prime is 221022112109. The next prime is 221022112139. The reversal of 221022112112 is 211211220122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1578062 + ... + 1712402.

Almost surely, 2^221022112112 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 221022112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223314288444).

221022112112 is an abundant number, since it is smaller than the sum of its proper divisors (225606464776).

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

221022112112 is a wasteful number, since it uses less digits than its factorization.

221022112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134518 (or 134481 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022112112 its reverse (211211220122), we get a palindrome (432233332234).

The spelling of 221022112112 in words is "two hundred twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred twelve".