2102212120 has 64 divisors (see below), whose sum is σ = 4815360000. Its totient is φ = 825821568.

The previous prime is 2102212109. The next prime is 2102212157. The reversal of 2102212120 is 212122012.

It is a happy number.

It is a super-4 number, since 4×2102212120⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102212120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627169 + ... + 630511.

It is an arithmetic number, because the mean of its divisors is an integer number (75240000).

Almost surely, 2^2102212120 is an apocalyptic number.

2102212120 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 2102212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407680000).

2102212120 is an abundant number, since it is smaller than the sum of its proper divisors (2713147880).

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

2102212120 is a wasteful number, since it uses less digits than its factorization.

2102212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2102212120 is about 45849.8868046585. The cubic root of 2102212120 is about 1281.0286571596.

Adding to 2102212120 its reverse (212122012), we get a palindrome (2314334132).

The spelling of 2102212120 in words is "two billion, one hundred two million, two hundred twelve thousand, one hundred twenty".