2120122400 has 144 divisors (see below), whose sum is σ = 5711821920. Its totient is φ = 762009600.

The previous prime is 2120122397. The next prime is 2120122463. The reversal of 2120122400 is 42210212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781847 + ... + 784553.

It is an arithmetic number, because the mean of its divisors is an integer number (39665430).

Almost surely, 2^2120122400 is an apocalyptic number.

2120122400 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 2120122400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2855910960).

2120122400 is an abundant number, since it is smaller than the sum of its proper divisors (3591699520).

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

2120122400 is a wasteful number, since it uses less digits than its factorization.

2120122400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120122400 is about 46044.7868927634. The cubic root of 2120122400 is about 1284.6563803365.

Adding to 2120122400 its reverse (42210212), we get a palindrome (2162332612).

It can be divided in two parts, 212012 and 2400, that added together give a palindrome (214412).

The spelling of 2120122400 in words is "two billion, one hundred twenty million, one hundred twenty-two thousand, four hundred".