12122031321 has 8 divisors (see below), whose sum is σ = 17958564960. Its totient is φ = 8081354196.

The previous prime is 12122031319. The next prime is 12122031371. The reversal of 12122031321 is 12313022121.

12122031321 is a `hidden beast` number, since 121 + 220 + 3 + 1 + 321 = 666.

It is not a de Polignac number, because 12122031321 - 2¹ = 12122031319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122031294 and 12122031303.

It is not an unprimeable number, because it can be changed into a prime (12122031371) 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, 224482035 + ... + 224482088.

It is an arithmetic number, because the mean of its divisors is an integer number (2244820620).

Almost surely, 2^12122031321 is an apocalyptic number.

It is an amenable number.

12122031321 is a deficient number, since it is larger than the sum of its proper divisors (5836533639).

12122031321 is an equidigital number, since it uses as much as digits as its factorization.

12122031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448964132 (or 448964126 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12122031321 its reverse (12313022121), we get a palindrome (24435053442).

The spelling of 12122031321 in words is "twelve billion, one hundred twenty-two million, thirty-one thousand, three hundred twenty-one".