12071191872 has 56 divisors (see below), whose sum is σ = 33619338400. Its totient is φ = 3811954176.

The previous prime is 12071191871. The next prime is 12071191927. The reversal of 12071191872 is 27819117021.

It is a self number, because there is not a number n which added to its sum of digits gives 12071191872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12071191871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650847 + ... + 1658142.

Almost surely, 2^12071191872 is an apocalyptic number.

12071191872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12071191872 is an abundant number, since it is smaller than the sum of its proper divisors (21548146528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12071191872 is a wasteful number, since it uses less digits than its factorization.

12071191872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309023 (or 3309013 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 39.

The spelling of 12071191872 in words is "twelve billion, seventy-one million, one hundred ninety-one thousand, eight hundred seventy-two".