12231021321 has 24 divisors (see below), whose sum is σ = 17853985344. Its totient is φ = 8067837600.

The previous prime is 12231021307. The next prime is 12231021337. The reversal of 12231021321 is 12312013221.

12231021321 is a `hidden beast` number, since 12 + 2 + 310 + 21 + 321 = 666.

It is not a de Polignac number, because 12231021321 - 2⁵ = 12231021289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12231021294 and 12231021303.

It is not an unprimeable number, because it can be changed into a prime (12231026321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1693500 + ... + 1700706.

It is an arithmetic number, because the mean of its divisors is an integer number (743916056).

Almost surely, 2^12231021321 is an apocalyptic number.

It is an amenable number.

12231021321 is a deficient number, since it is larger than the sum of its proper divisors (5622964023).

12231021321 is a wasteful number, since it uses less digits than its factorization.

12231021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181 (or 9178 counting only the distinct ones).

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

Adding to 12231021321 its reverse (12312013221), we get a palindrome (24543034542).

The spelling of 12231021321 in words is "twelve billion, two hundred thirty-one million, twenty-one thousand, three hundred twenty-one".