12132122321 has 4 divisors (see below), whose sum is σ = 13235042544. Its totient is φ = 11029202100.

The previous prime is 12132122293. The next prime is 12132122329. The reversal of 12132122321 is 12322123121.

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 12132122321 - 2⁶ = 12132122257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12132122293 and 12132122302.

It is not an unprimeable number, because it can be changed into a prime (12132122329) 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, 551460095 + ... + 551460116.

It is an arithmetic number, because the mean of its divisors is an integer number (3308760636).

Almost surely, 2^12132122321 is an apocalyptic number.

12132122321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12132122321 is a deficient number, since it is larger than the sum of its proper divisors (1102920223).

12132122321 is a wasteful number, since it uses less digits than its factorization.

12132122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102920222.

The product of its digits is 288, while the sum is 20.

Adding to 12132122321 its reverse (12322123121), we get a palindrome (24454245442).

The spelling of 12132122321 in words is "twelve billion, one hundred thirty-two million, one hundred twenty-two thousand, three hundred twenty-one".