12823401109 has 4 divisors (see below), whose sum is σ = 12824776000. Its totient is φ = 12822026220.

The previous prime is 12823401103. The next prime is 12823401137. The reversal of 12823401109 is 90110432821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90110432821 = 19 ⋅4742654359.

It is a cyclic number.

It is not a de Polignac number, because 12823401109 - 2¹⁷ = 12823270037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12823401103) 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, 673359 + ... + 692140.

It is an arithmetic number, because the mean of its divisors is an integer number (3206194000).

Almost surely, 2^12823401109 is an apocalyptic number.

It is an amenable number.

12823401109 is a deficient number, since it is larger than the sum of its proper divisors (1374891).

12823401109 is an equidigital number, since it uses as much as digits as its factorization.

12823401109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374890.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 12823401109 in words is "twelve billion, eight hundred twenty-three million, four hundred one thousand, one hundred nine".