2121201 has 16 divisors (see below), whose sum is σ = 3165120. Its totient is φ = 1404000.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121201 is 1021212.

2121201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2121201 - 2¹ = 2121199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 6933.

It is an arithmetic number, because the mean of its divisors is an integer number (197820).

2^2121201 is an apocalyptic number.

It is an amenable number.

2121201 is a deficient number, since it is larger than the sum of its proper divisors (1043919).

2121201 is a wasteful number, since it uses less digits than its factorization.

2121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2121201 is about 1456.4343445552. The cubic root of 2121201 is about 128.4874197236.

Adding to 2121201 its reverse (1021212), we get a palindrome (3142413).

The spelling of 2121201 in words is "two million, one hundred twenty-one thousand, two hundred one".