12219127905 has 32 divisors (see below), whose sum is σ = 20727705600. Its totient is φ = 6129438912.

The previous prime is 12219127891. The next prime is 12219127909. The reversal of 12219127905 is 50972191221.

It is not a de Polignac number, because 12219127905 - 2⁴ = 12219127889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12219127909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114609 + ... + 193838.

It is an arithmetic number, because the mean of its divisors is an integer number (647740800).

Almost surely, 2^12219127905 is an apocalyptic number.

12219127905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12219127905 is a deficient number, since it is larger than the sum of its proper divisors (8508577695).

12219127905 is a wasteful number, since it uses less digits than its factorization.

12219127905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308613.

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 12219127905 in words is "twelve billion, two hundred nineteen million, one hundred twenty-seven thousand, nine hundred five".