3212221020521 has 4 divisors (see below), whose sum is σ = 3212228312832. Its totient is φ = 3212213728212.

The previous prime is 3212221020497. The next prime is 3212221020529. The reversal of 3212221020521 is 1250201222123.

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 3212221020521 - 2⁶ = 3212221020457 is a prime.

It is a super-2 number, since 2×3212221020521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3212221020529) 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, 2939801 + ... + 3881606.

It is an arithmetic number, because the mean of its divisors is an integer number (803057078208).

Almost surely, 2^{3212221020521} is an apocalyptic number.

It is an amenable number.

3212221020521 is a deficient number, since it is larger than the sum of its proper divisors (7292311).

3212221020521 is an equidigital number, since it uses as much as digits as its factorization.

3212221020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292310.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 3212221020521 its reverse (1250201222123), we get a palindrome (4462422242644).

The spelling of 3212221020521 in words is "three trillion, two hundred twelve billion, two hundred twenty-one million, twenty thousand, five hundred twenty-one".