2122123420 has 24 divisors (see below), whose sum is σ = 4499730144. Its totient is φ = 840607296.

The previous prime is 2122123397. The next prime is 2122123453. The reversal of 2122123420 is 243212212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 513019 + ... + 517138.

It is an arithmetic number, because the mean of its divisors is an integer number (187488756).

Almost surely, 2^2122123420 is an apocalyptic number.

2122123420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122123420 is an abundant number, since it is smaller than the sum of its proper divisors (2377606724).

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

2122123420 is a wasteful number, since it uses less digits than its factorization.

2122123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030269 (or 1030267 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2122123420 is about 46066.5108294518. The cubic root of 2122123420 is about 1285.0604159394.

Adding to 2122123420 its reverse (243212212), we get a palindrome (2365335632).

The spelling of 2122123420 in words is "two billion, one hundred twenty-two million, one hundred twenty-three thousand, four hundred twenty".