2121200 has 30 divisors (see below), whose sum is σ = 5097144. Its totient is φ = 848320.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121200 is 21212.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2252 + ... + 3051.

2^2121200 is an apocalyptic number.

2121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121200 is an abundant number, since it is smaller than the sum of its proper divisors (2975944).

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

2121200 is a wasteful number, since it uses less digits than its factorization.

2121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 2121200 is about 1456.4340012510. The cubic root of 2121200 is about 128.4873995326.

Adding to 2121200 its reverse (21212), we get a palindrome (2142412).

Multiplying 2121200 by its reverse (21212), we get a square (44994894400 = 212120²).

2121200 divided by its reverse (21212) gives a square (100 = 10²).

The spelling of 2121200 in words is "two million, one hundred twenty-one thousand, two hundred".