3240121421 has 4 divisors (see below), whose sum is σ = 3240832992. Its totient is φ = 3239409852.

The previous prime is 3240121393. The next prime is 3240121427. The reversal of 3240121421 is 1241210423.

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 a cyclic number.

It is not a de Polignac number, because 3240121421 - 2¹⁰ = 3240120397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3240121393 and 3240121402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3240121427) 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, 348911 + ... + 358076.

It is an arithmetic number, because the mean of its divisors is an integer number (810208248).

Almost surely, 2^3240121421 is an apocalyptic number.

It is an amenable number.

3240121421 is a deficient number, since it is larger than the sum of its proper divisors (711571).

3240121421 is an equidigital number, since it uses as much as digits as its factorization.

3240121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711570.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 3240121421 is about 56922.0644478044. The cubic root of 3240121421 is about 1479.7457289313.

Adding to 3240121421 its reverse (1241210423), we get a palindrome (4481331844).

The spelling of 3240121421 in words is "three billion, two hundred forty million, one hundred twenty-one thousand, four hundred twenty-one".