3421240221 has 24 divisors (see below), whose sum is σ = 5344620960. Its totient is φ = 1940918112.

The previous prime is 3421240219. The next prime is 3421240241. The reversal of 3421240221 is 1220421243.

It is not a de Polignac number, because 3421240221 - 2¹ = 3421240219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421240241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63286 + ... + 104151.

It is an arithmetic number, because the mean of its divisors is an integer number (222692540).

Almost surely, 2^3421240221 is an apocalyptic number.

It is an amenable number.

3421240221 is a deficient number, since it is larger than the sum of its proper divisors (1923380739).

3421240221 is a wasteful number, since it uses less digits than its factorization.

3421240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167593 (or 167586 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3421240221 is about 58491.3687735208. The cubic root of 3421240221 is about 1506.8193537394.

Adding to 3421240221 its reverse (1220421243), we get a palindrome (4641661464).

The spelling of 3421240221 in words is "three billion, four hundred twenty-one million, two hundred forty thousand, two hundred twenty-one".