2110421 has 4 divisors (see below), whose sum is σ = 2114700. Its totient is φ = 2106144.

The previous prime is 2110399. The next prime is 2110439. The reversal of 2110421 is 1240112.

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 448900 + 1661521 = 670^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110421 - 2¹⁸ = 1848277 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 (2110021) 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, 1286 + ... + 2423.

It is an arithmetic number, because the mean of its divisors is an integer number (528675).

2^2110421 is an apocalyptic number.

It is an amenable number.

2110421 is a deficient number, since it is larger than the sum of its proper divisors (4279).

2110421 is an equidigital number, since it uses as much as digits as its factorization.

2110421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278.

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

The square root of 2110421 is about 1452.7288115818. The cubic root of 2110421 is about 128.2693911329.

Adding to 2110421 its reverse (1240112), we get a palindrome (3350533).

The spelling of 2110421 in words is "two million, one hundred ten thousand, four hundred twenty-one".