2112110012220 has 144 divisors (see below), whose sum is σ = 6413827668192. Its totient is φ = 519091322880.

The previous prime is 2112110012189. The next prime is 2112110012261. The reversal of 2112110012220 is 222100112112.

It is a super-2 number, since 2×2112110012220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2112110012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6337264 + ... + 6662216.

It is an arithmetic number, because the mean of its divisors is an integer number (44540469918).

Almost surely, 2^{2112110012220} is an apocalyptic number.

2112110012220 is a gapful number since it is divisible by the number (20) 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 2112110012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3206913834096).

2112110012220 is an abundant number, since it is smaller than the sum of its proper divisors (4301717655972).

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

2112110012220 is a wasteful number, since it uses less digits than its factorization.

2112110012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325632 (or 325617 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2112110012220 its reverse (222100112112), we get a palindrome (2334210124332).

The spelling of 2112110012220 in words is "two trillion, one hundred twelve billion, one hundred ten million, twelve thousand, two hundred twenty".