12031322398 has 4 divisors (see below), whose sum is σ = 18046983600. Its totient is φ = 6015661198.

The previous prime is 12031322393. The next prime is 12031322417. The reversal of 12031322398 is 89322313021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89322313021 = 23 ⋅3883578827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031322393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3007830598 + ... + 3007830601.

It is an arithmetic number, because the mean of its divisors is an integer number (4511745900).

Almost surely, 2^12031322398 is an apocalyptic number.

12031322398 is a deficient number, since it is larger than the sum of its proper divisors (6015661202).

12031322398 is an equidigital number, since it uses as much as digits as its factorization.

12031322398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015661201.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 12031322398 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, three hundred ninety-eight".