2102112120 has 128 divisors (see below), whose sum is σ = 6659884800. Its totient is φ = 529330176.

The previous prime is 2102112119. The next prime is 2102112127. The reversal of 2102112120 is 212112012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2102112096 and 2102112105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102112127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 789832 + ... + 792488.

It is an arithmetic number, because the mean of its divisors is an integer number (52030350).

Almost surely, 2^2102112120 is an apocalyptic number.

2102112120 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 2102112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3329942400).

2102112120 is an abundant number, since it is smaller than the sum of its proper divisors (4557772680).

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

2102112120 is a wasteful number, since it uses less digits than its factorization.

2102112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2102112120 is about 45848.7962764564. The cubic root of 2102112120 is about 1281.0083444462.

Adding to 2102112120 its reverse (212112012), we get a palindrome (2314224132).

The spelling of 2102112120 in words is "two billion, one hundred two million, one hundred twelve thousand, one hundred twenty".