12011029985 has 16 divisors (see below), whose sum is σ = 15042896640. Its totient is φ = 9189216960.

The previous prime is 12011029981. The next prime is 12011029993. The reversal of 12011029985 is 58992011021.

It is a happy number.

It is not a de Polignac number, because 12011029985 - 2² = 12011029981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12011029981) 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 15 ways as a sum of consecutive naturals, for example, 963140 + ... + 975530.

It is an arithmetic number, because the mean of its divisors is an integer number (940181040).

Almost surely, 2^12011029985 is an apocalyptic number.

It is an amenable number.

12011029985 is a deficient number, since it is larger than the sum of its proper divisors (3031866655).

12011029985 is a wasteful number, since it uses less digits than its factorization.

12011029985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20848.

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 12011029985 in words is "twelve billion, eleven million, twenty-nine thousand, nine hundred eighty-five".