4401231421 has 4 divisors (see below), whose sum is σ = 4632875200. Its totient is φ = 4169587644.

The previous prime is 4401231409. The next prime is 4401231433. The reversal of 4401231421 is 1241321044.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (4401231409) and next prime (4401231433).

It is a cyclic number.

It is not a de Polignac number, because 4401231421 - 2¹¹ = 4401229373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4401231392 and 4401231401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4401231491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115821861 + ... + 115821898.

It is an arithmetic number, because the mean of its divisors is an integer number (1158218800).

Almost surely, 2^4401231421 is an apocalyptic number.

It is an amenable number.

4401231421 is a deficient number, since it is larger than the sum of its proper divisors (231643779).

4401231421 is a wasteful number, since it uses less digits than its factorization.

4401231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231643778.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 4401231421 is about 66341.7773427876. Note that the first 3 decimals coincide. The cubic root of 4401231421 is about 1638.7953950362.

Adding to 4401231421 its reverse (1241321044), we get a palindrome (5642552465).

The spelling of 4401231421 in words is "four billion, four hundred one million, two hundred thirty-one thousand, four hundred twenty-one".