2121200201 has 4 divisors (see below), whose sum is σ = 2150257812. Its totient is φ = 2092142592.

The previous prime is 2121200183. The next prime is 2121200209. The reversal of 2121200201 is 1020021212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 559369801 + 1561830400 = 23651^2 + 39520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121200201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121200209) 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 3 ways as a sum of consecutive naturals, for example, 14528696 + ... + 14528841.

It is an arithmetic number, because the mean of its divisors is an integer number (537564453).

Almost surely, 2^2121200201 is an apocalyptic number.

It is an amenable number.

2121200201 is a deficient number, since it is larger than the sum of its proper divisors (29057611).

2121200201 is an equidigital number, since it uses as much as digits as its factorization.

2121200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29057610.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2121200201 is about 46056.4892387598. The cubic root of 2121200201 is about 1284.8740359097.

Adding to 2121200201 its reverse (1020021212), we get a palindrome (3141221413).

The spelling of 2121200201 in words is "two billion, one hundred twenty-one million, two hundred thousand, two hundred one".