213112011112 has 128 divisors (see below), whose sum is σ = 541819756800. Its totient is φ = 75884544000.

The previous prime is 213112011107. The next prime is 213112011121. The reversal of 213112011112 is 211110211312.

It is a happy number.

It is a super-2 number, since 2×213112011112² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677064 + ... + 940552.

It is an arithmetic number, because the mean of its divisors is an integer number (4232966850).

Almost surely, 2^213112011112 is an apocalyptic number.

213112011112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213112011112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270909878400).

213112011112 is an abundant number, since it is smaller than the sum of its proper divisors (328707745688).

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

213112011112 is a wasteful number, since it uses less digits than its factorization.

213112011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263627 (or 263623 counting only the distinct ones).

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

Adding to 213112011112 its reverse (211110211312), we get a palindrome (424222222424).

The spelling of 213112011112 in words is "two hundred thirteen billion, one hundred twelve million, eleven thousand, one hundred twelve".