12788030921 has 16 divisors (see below), whose sum is σ = 14278080960. Its totient is φ = 11382197760.

The previous prime is 12788030917. The next prime is 12788030923. The reversal of 12788030921 is 12903088721.

It is not a de Polignac number, because 12788030921 - 2² = 12788030917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12788030923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149765 + ... + 219101.

It is an arithmetic number, because the mean of its divisors is an integer number (892380060).

Almost surely, 2^12788030921 is an apocalyptic number.

It is an amenable number.

12788030921 is a deficient number, since it is larger than the sum of its proper divisors (1490050039).

12788030921 is a wasteful number, since it uses less digits than its factorization.

12788030921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69944.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 12788030921 in words is "twelve billion, seven hundred eighty-eight million, thirty thousand, nine hundred twenty-one".