12231331021 has 16 divisors (see below), whose sum is σ = 15056544384. Its totient is φ = 9675866304.

The previous prime is 12231330989. The next prime is 12231331031. The reversal of 12231331021 is 12013313221.

12231331021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12231331021 - 2⁵ = 12231330989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12231331021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231331031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014390 + ... + 1026376.

It is an arithmetic number, because the mean of its divisors is an integer number (941034024).

Almost surely, 2^12231331021 is an apocalyptic number.

It is an amenable number.

12231331021 is a deficient number, since it is larger than the sum of its proper divisors (2825213363).

12231331021 is a wasteful number, since it uses less digits than its factorization.

12231331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23220.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12231331021 its reverse (12013313221), we get a palindrome (24244644242).

The spelling of 12231331021 in words is "twelve billion, two hundred thirty-one million, three hundred thirty-one thousand, twenty-one".