2121331 has 8 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 1997640.

The previous prime is 2121323. The next prime is 2121337. The reversal of 2121331 is 1331212.

2121331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121331 - 2³ = 2121323 is a prime.

It is a super-2 number, since 2×2121331² = 9000090423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121337) 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 7 ways as a sum of consecutive naturals, for example, 5730 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (280800).

2^2121331 is an apocalyptic number.

2121331 is a deficient number, since it is larger than the sum of its proper divisors (125069).

2121331 is a wasteful number, since it uses less digits than its factorization.

2121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689.

The product of its digits is 36, while the sum is 13.

The square root of 2121331 is about 1456.4789734150. The cubic root of 2121331 is about 128.4900444981.

Adding to 2121331 its reverse (1331212), we get a palindrome (3452543).

The spelling of 2121331 in words is "two million, one hundred twenty-one thousand, three hundred thirty-one".