12210312121221 has 8 divisors (see below), whose sum is σ = 16283553668640. Its totient is φ = 8138639327312.

The previous prime is 12210312121219. The next prime is 12210312121229. The reversal of 12210312121221 is 12212121301221.

12210312121221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12210312121221 - 2¹ = 12210312121219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210312121229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392170215 + ... + 392201348.

It is an arithmetic number, because the mean of its divisors is an integer number (2035444208580).

Almost surely, 2^{12210312121221} is an apocalyptic number.

It is an amenable number.

12210312121221 is a deficient number, since it is larger than the sum of its proper divisors (4073241547419).

12210312121221 is an equidigital number, since it uses as much as digits as its factorization.

12210312121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784376755.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12210312121221 its reverse (12212121301221), we get a palindrome (24422433422442).

The spelling of 12210312121221 in words is "twelve trillion, two hundred ten billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".