3221212120213 has 4 divisors (see below), whose sum is σ = 3269289913120. Its totient is φ = 3173134327308.

The previous prime is 3221212120199. The next prime is 3221212120229. The reversal of 3221212120213 is 3120212121223.

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.

It is a cyclic number.

It is not a de Polignac number, because 3221212120213 - 2¹⁷ = 3221211989141 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 (3221212120253) 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, 24038896353 + ... + 24038896486.

It is an arithmetic number, because the mean of its divisors is an integer number (817322478280).

Almost surely, 2^{3221212120213} is an apocalyptic number.

It is an amenable number.

3221212120213 is a deficient number, since it is larger than the sum of its proper divisors (48077792907).

3221212120213 is an equidigital number, since it uses as much as digits as its factorization.

3221212120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48077792906.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 3221212120213 its reverse (3120212121223), we get a palindrome (6341424241436).

The spelling of 3221212120213 in words is "three trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, two hundred thirteen".