12310021982 has 4 divisors (see below), whose sum is σ = 18465032976. Its totient is φ = 6155010990.

The previous prime is 12310021949. The next prime is 12310021987. The reversal of 12310021982 is 28912001321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28912001321 = 7 ⋅4130285903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310021987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3077505494 + ... + 3077505497.

It is an arithmetic number, because the mean of its divisors is an integer number (4616258244).

Almost surely, 2^12310021982 is an apocalyptic number.

12310021982 is a deficient number, since it is larger than the sum of its proper divisors (6155010994).

12310021982 is an equidigital number, since it uses as much as digits as its factorization.

12310021982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155010993.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 12310021982 in words is "twelve billion, three hundred ten million, twenty-one thousand, nine hundred eighty-two".