2124122220 has 144 divisors (see below), whose sum is σ = 7334675712. Its totient is φ = 492539520.

The previous prime is 2124122207. The next prime is 2124122251. The reversal of 2124122220 is 222214212.

2124122220 is a `hidden beast` number, since 212 + 412 + 22 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2124122193 and 2124122202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22219 + ... + 68861.

It is an arithmetic number, because the mean of its divisors is an integer number (50935248).

Almost surely, 2^2124122220 is an apocalyptic number.

2124122220 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 2124122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3667337856).

2124122220 is an abundant number, since it is smaller than the sum of its proper divisors (5210553492).

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

2124122220 is a wasteful number, since it uses less digits than its factorization.

2124122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46692 (or 46687 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2124122220 is about 46088.2004421956. The cubic root of 2124122220 is about 1285.4637498078.

Adding to 2124122220 its reverse (222214212), we get a palindrome (2346336432).

The spelling of 2124122220 in words is "two billion, one hundred twenty-four million, one hundred twenty-two thousand, two hundred twenty".