3313220021 has 4 divisors (see below), whose sum is σ = 3383714112. Its totient is φ = 3242725932.

The previous prime is 3313220017. The next prime is 3313220039. The reversal of 3313220021 is 1200223133.

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: 1200223133 = 17921 ⋅66973.

It is a cyclic number.

It is not a de Polignac number, because 3313220021 - 2² = 3313220017 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 (3313220051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35246975 + ... + 35247068.

It is an arithmetic number, because the mean of its divisors is an integer number (845928528).

Almost surely, 2^3313220021 is an apocalyptic number.

It is an amenable number.

3313220021 is a deficient number, since it is larger than the sum of its proper divisors (70494091).

3313220021 is an equidigital number, since it uses as much as digits as its factorization.

3313220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70494090.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3313220021 is about 57560.5769689637. The cubic root of 3313220021 is about 1490.7909889628.

Adding to 3313220021 its reverse (1200223133), we get a palindrome (4513443154).

The spelling of 3313220021 in words is "three billion, three hundred thirteen million, two hundred twenty thousand, twenty-one".