12132320331 has 4 divisors (see below), whose sum is σ = 16176427112. Its totient is φ = 8088213552.

The previous prime is 12132320327. The next prime is 12132320339. The reversal of 12132320331 is 13302323121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13302323121 = 3 ⋅4434107707.

It is not a de Polignac number, because 12132320331 - 2² = 12132320327 is a prime.

It is a super-2 number, since 2×12132320331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12132320298 and 12132320307.

It is not an unprimeable number, because it can be changed into a prime (12132320339) 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, 2022053386 + ... + 2022053391.

It is an arithmetic number, because the mean of its divisors is an integer number (4044106778).

Almost surely, 2^12132320331 is an apocalyptic number.

12132320331 is a deficient number, since it is larger than the sum of its proper divisors (4044106781).

12132320331 is an equidigital number, since it uses as much as digits as its factorization.

12132320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044106780.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12132320331 its reverse (13302323121), we get a palindrome (25434643452).

The spelling of 12132320331 in words is "twelve billion, one hundred thirty-two million, three hundred twenty thousand, three hundred thirty-one".