2121123200 has 96 divisors (see below), whose sum is σ = 5988448560. Its totient is φ = 727234560.

The previous prime is 2121123163. The next prime is 2121123211. The reversal of 2121123200 is 23211212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24947 + ... + 69746.

Almost surely, 2^2121123200 is an apocalyptic number.

2121123200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121123200 is an abundant number, since it is smaller than the sum of its proper divisors (3867325360).

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

2121123200 is an equidigital number, since it uses as much as digits as its factorization.

2121123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94724 (or 94707 counting only the distinct ones).

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

The square root of 2121123200 is about 46055.6532903399. The cubic root of 2121123200 is about 1284.8584884564.

Adding to 2121123200 its reverse (23211212), we get a palindrome (2144334412).

The spelling of 2121123200 in words is "two billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred".