2103121400 has 192 divisors, whose sum is σ = 5378524800. Its totient is φ = 762048000.

The previous prime is 2103121393. The next prime is 2103121409. The reversal of 2103121400 is 41213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103121409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9967295 + ... + 9967505.

It is an arithmetic number, because the mean of its divisors is an integer number (28013150).

Almost surely, 2^2103121400 is an apocalyptic number.

2103121400 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 2103121400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2689262400).

2103121400 is an abundant number, since it is smaller than the sum of its proper divisors (3275403400).

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

2103121400 is a wasteful number, since it uses less digits than its factorization.

2103121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2103121400 is about 45859.8015695663. The cubic root of 2103121400 is about 1281.2133270487.

Adding to 2103121400 its reverse (41213012), we get a palindrome (2144334412).

The spelling of 2103121400 in words is "two billion, one hundred three million, one hundred twenty-one thousand, four hundred".