2012132321 has 4 divisors (see below), whose sum is σ = 2012222100. Its totient is φ = 2012042544.

The previous prime is 2012132279. The next prime is 2012132327. The reversal of 2012132321 is 1232312102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 79299025 + 1932833296 = 8905^2 + 43964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012132321 - 2¹⁸ = 2011870177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012132321.

It is not an unprimeable number, because it can be changed into a prime (2012132327) 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, 19895 + ... + 66483.

It is an arithmetic number, because the mean of its divisors is an integer number (503055525).

Almost surely, 2^2012132321 is an apocalyptic number.

It is an amenable number.

2012132321 is a deficient number, since it is larger than the sum of its proper divisors (89779).

2012132321 is an equidigital number, since it uses as much as digits as its factorization.

2012132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89778.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2012132321 is about 44856.7979352071. The cubic root of 2012132321 is about 1262.4635435148.

Adding to 2012132321 its reverse (1232312102), we get a palindrome (3244444423).

The spelling of 2012132321 in words is "two billion, twelve million, one hundred thirty-two thousand, three hundred twenty-one".