3313213621 has 2 divisors, whose sum is σ = 3313213622. Its totient is φ = 3313213620.

The previous prime is 3313213619. The next prime is 3313213637. The reversal of 3313213621 is 1263123133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1865030596 + 1448183025 = 43186^2 + 38055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3313213621 - 2¹ = 3313213619 is a prime.

Together with 3313213619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3313213661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1656606810 + 1656606811.

It is an arithmetic number, because the mean of its divisors is an integer number (1656606811).

Almost surely, 2^3313213621 is an apocalyptic number.

It is an amenable number.

3313213621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3313213621 is an equidigital number, since it uses as much as digits as its factorization.

3313213621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 25.

The square root of 3313213621 is about 57560.5213753315. The cubic root of 3313213621 is about 1490.7900290640.

Adding to 3313213621 its reverse (1263123133), we get a palindrome (4576336754).

The spelling of 3313213621 in words is "three billion, three hundred thirteen million, two hundred thirteen thousand, six hundred twenty-one".