3213213021 has 24 divisors (see below), whose sum is σ = 4822970880. Its totient is φ = 2058962976.

The previous prime is 3213213007. The next prime is 3213213043. The reversal of 3213213021 is 1203123123.

3213213021 is a `hidden beast` number, since 321 + 321 + 3 + 0 + 21 = 666.

It is not a de Polignac number, because 3213213021 - 2⁶ = 3213212957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3213212985 and 3213213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213213721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30600 + ... + 85806.

It is an arithmetic number, because the mean of its divisors is an integer number (200957120).

Almost surely, 2^3213213021 is an apocalyptic number.

It is an amenable number.

3213213021 is a deficient number, since it is larger than the sum of its proper divisors (1609757859).

3213213021 is a wasteful number, since it uses less digits than its factorization.

3213213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55465 (or 55462 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3213213021 is about 56685.2098964095. The cubic root of 3213213021 is about 1475.6380303590.

Adding to 3213213021 its reverse (1203123123), we get a palindrome (4416336144).

The spelling of 3213213021 in words is "three billion, two hundred thirteen million, two hundred thirteen thousand, twenty-one".