2121021123200 has 192 divisors, whose sum is σ = 5991497233920. Its totient is φ = 726794342400.

The previous prime is 2121021123101. The next prime is 2121021123283. The reversal of 2121021123200 is 23211201212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40809230 + ... + 40861170.

It is an arithmetic number, because the mean of its divisors is an integer number (31205714760).

Almost surely, 2^{2121021123200} is an apocalyptic number.

2121021123200 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 2121021123200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2995748616960).

2121021123200 is an abundant number, since it is smaller than the sum of its proper divisors (3870476110720).

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

2121021123200 is a wasteful number, since it uses less digits than its factorization.

2121021123200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53795 (or 53778 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121021123200 its reverse (23211201212), we get a palindrome (2144232324412).

The spelling of 2121021123200 in words is "two trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-three thousand, two hundred".