3220421421 has 8 divisors (see below), whose sum is σ = 4907308864. Its totient is φ = 1840240800.

The previous prime is 3220421411. The next prime is 3220421507. The reversal of 3220421421 is 1241240223.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3220421421 - 2⁵ = 3220421389 is a prime.

It is a super-2 number, since 2×3220421421² = 20742228257671318482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 153353401 = 3220421421 / (3 + 2 + 2 + 0 + 4 + 2 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220421411) 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 7 ways as a sum of consecutive naturals, for example, 76676680 + ... + 76676721.

It is an arithmetic number, because the mean of its divisors is an integer number (613413608).

Almost surely, 2^3220421421 is an apocalyptic number.

It is an amenable number.

3220421421 is a deficient number, since it is larger than the sum of its proper divisors (1686887443).

3220421421 is a wasteful number, since it uses less digits than its factorization.

3220421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153353411.

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

The square root of 3220421421 is about 56748.7569996031. The cubic root of 3220421421 is about 1476.7406696592.

Adding to 3220421421 its reverse (1241240223), we get a palindrome (4461661644).

The spelling of 3220421421 in words is "three billion, two hundred twenty million, four hundred twenty-one thousand, four hundred twenty-one".