3421343021 has 4 divisors (see below), whose sum is σ = 3426352992. Its totient is φ = 3416333052.

The previous prime is 3421343017. The next prime is 3421343027. The reversal of 3421343021 is 1203431243.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1203431243 = 7 ⋅171918749.

It is a cyclic number.

It is not a de Polignac number, because 3421343021 - 2² = 3421343017 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 (3421343027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2503961 + ... + 2505326.

It is an arithmetic number, because the mean of its divisors is an integer number (856588248).

Almost surely, 2^3421343021 is an apocalyptic number.

It is an amenable number.

3421343021 is a deficient number, since it is larger than the sum of its proper divisors (5009971).

3421343021 is an equidigital number, since it uses as much as digits as its factorization.

3421343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009970.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3421343021 is about 58492.2475290529. The cubic root of 3421343021 is about 1506.8344456816.

Adding to 3421343021 its reverse (1203431243), we get a palindrome (4624774264).

The spelling of 3421343021 in words is "three billion, four hundred twenty-one million, three hundred forty-three thousand, twenty-one".