3321020021 has 8 divisors (see below), whose sum is σ = 3677005344. Its totient is φ = 2974047120.

The previous prime is 3321019997. The next prime is 3321020077. The reversal of 3321020021 is 1200201233.

It is a happy number.

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

It is not a de Polignac number, because 3321020021 - 2²² = 3316825717 is a prime.

It is a super-2 number, since 2×3321020021² = 22058347959765680882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3321019978 and 3321020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3321020081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252330 + ... + 2253803.

It is an arithmetic number, because the mean of its divisors is an integer number (459625668).

Almost surely, 2^3321020021 is an apocalyptic number.

It is an amenable number.

3321020021 is a deficient number, since it is larger than the sum of its proper divisors (355985323).

3321020021 is a wasteful number, since it uses less digits than its factorization.

3321020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506211.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3321020021 is about 57628.2918452387. The cubic root of 3321020021 is about 1491.9599481147.

Adding to 3321020021 its reverse (1200201233), we get a palindrome (4521221254).

The spelling of 3321020021 in words is "three billion, three hundred twenty-one million, twenty thousand, twenty-one".