12210323131221 has 4 divisors (see below), whose sum is σ = 16280430841632. Its totient is φ = 8140215420812.

The previous prime is 12210323131213. The next prime is 12210323131231. The reversal of 12210323131221 is 12213132301221.

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 12210323131221 - 2³ = 12210323131213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210323131191 and 12210323131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210323131211) 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, 2035053855201 + ... + 2035053855206.

It is an arithmetic number, because the mean of its divisors is an integer number (4070107710408).

Almost surely, 2^{12210323131221} is an apocalyptic number.

It is an amenable number.

12210323131221 is a deficient number, since it is larger than the sum of its proper divisors (4070107710411).

12210323131221 is an equidigital number, since it uses as much as digits as its factorization.

12210323131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070107710410.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12210323131221 its reverse (12213132301221), we get a palindrome (24423455432442).

The spelling of 12210323131221 in words is "twelve trillion, two hundred ten billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".