12210011000221 has 4 divisors (see below), whose sum is σ = 12210063500700. Its totient is φ = 12209958499744.

The previous prime is 12210011000207. The next prime is 12210011000269. The reversal of 12210011000221 is 12200011001221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3772583674596 + 8437427325625 = 1942314^2 + 2904725^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210011000221 - 2³⁷ = 12072572046749 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 (12210011700221) 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, 25899826 + ... + 26367043.

It is an arithmetic number, because the mean of its divisors is an integer number (3052515875175).

Almost surely, 2^{12210011000221} is an apocalyptic number.

It is an amenable number.

12210011000221 is a deficient number, since it is larger than the sum of its proper divisors (52500479).

12210011000221 is an equidigital number, since it uses as much as digits as its factorization.

12210011000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52500478.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12210011000221 its reverse (12200011001221), we get a palindrome (24410022001442).

It can be divided in two parts, 1221001 and 1000221, that added together give a palindrome (2221222).

The spelling of 12210011000221 in words is "twelve trillion, two hundred ten billion, eleven million, two hundred twenty-one", and thus it is an aban number.