2201421 has 4 divisors (see below), whose sum is σ = 2935232. Its totient is φ = 1467612.

The previous prime is 2201417. The next prime is 2201431. The reversal of 2201421 is 1241022.

2201421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 2201421 - 2² = 2201417 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201397 and 2201406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201401) 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 3 ways as a sum of consecutive naturals, for example, 366901 + ... + 366906.

It is an arithmetic number, because the mean of its divisors is an integer number (733808).

2^2201421 is an apocalyptic number.

It is an amenable number.

2201421 is a deficient number, since it is larger than the sum of its proper divisors (733811).

2201421 is an equidigital number, since it uses as much as digits as its factorization.

2201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733810.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2201421 is about 1483.7186390957. The cubic root of 2201421 is about 130.0871407863.

Adding to 2201421 its reverse (1241022), we get a palindrome (3442443).

The spelling of 2201421 in words is "two million, two hundred one thousand, four hundred twenty-one".