12103928777 has 4 divisors (see below), whose sum is σ = 12740977680. Its totient is φ = 11466879876.

The previous prime is 12103928773. The next prime is 12103928783. The reversal of 12103928777 is 77782930121.

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 12103928777 - 2² = 12103928773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103928773) 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, 318524423 + ... + 318524460.

It is an arithmetic number, because the mean of its divisors is an integer number (3185244420).

Almost surely, 2^12103928777 is an apocalyptic number.

It is an amenable number.

12103928777 is a deficient number, since it is larger than the sum of its proper divisors (637048903).

12103928777 is an equidigital number, since it uses as much as digits as its factorization.

12103928777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637048902.

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 12103928777 in words is "twelve billion, one hundred three million, nine hundred twenty-eight thousand, seven hundred seventy-seven".