3213020221 has 8 divisors (see below), whose sum is σ = 3255878304. Its totient is φ = 3170261040.

The previous prime is 3213020207. The next prime is 3213020257. The reversal of 3213020221 is 1220203123.

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

It is a cyclic number.

It is not a de Polignac number, because 3213020221 - 2⁹ = 3213019709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213020195 and 3213020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213020201) 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, 41866 + ... + 90436.

It is an arithmetic number, because the mean of its divisors is an integer number (406984788).

Almost surely, 2^3213020221 is an apocalyptic number.

It is an amenable number.

3213020221 is a deficient number, since it is larger than the sum of its proper divisors (42858083).

3213020221 is an equidigital number, since it uses as much as digits as its factorization.

3213020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49451.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3213020221 is about 56683.5092509276. The cubic root of 3213020221 is about 1475.6085159030.

Adding to 3213020221 its reverse (1220203123), we get a palindrome (4433223344).

The spelling of 3213020221 in words is "three billion, two hundred thirteen million, twenty thousand, two hundred twenty-one".