2121200213 has 4 divisors (see below), whose sum is σ = 2314036608. Its totient is φ = 1928363820.

The previous prime is 2121200209. The next prime is 2121200293. The reversal of 2121200213 is 3120021212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121200213 - 2² = 2121200209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96418181 + ... + 96418202.

It is an arithmetic number, because the mean of its divisors is an integer number (578509152).

Almost surely, 2^2121200213 is an apocalyptic number.

It is an amenable number.

2121200213 is a deficient number, since it is larger than the sum of its proper divisors (192836395).

2121200213 is a wasteful number, since it uses less digits than its factorization.

2121200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192836394.

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

The square root of 2121200213 is about 46056.4893690346. The cubic root of 2121200213 is about 1284.8740383326.

Adding to 2121200213 its reverse (3120021212), we get a palindrome (5241221425).

The spelling of 2121200213 in words is "two billion, one hundred twenty-one million, two hundred thousand, two hundred thirteen".