12011111000 has 64 divisors (see below), whose sum is σ = 32121161280. Its totient is φ = 4118092800.

The previous prime is 12011110973. The next prime is 12011111033. The reversal of 12011111000 is 11111021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850937 + ... + 864936.

It is an arithmetic number, because the mean of its divisors is an integer number (501893145).

Almost surely, 2^12011111000 is an apocalyptic number.

12011111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011111000 is an abundant number, since it is smaller than the sum of its proper divisors (20110050280).

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

12011111000 is a wasteful number, since it uses less digits than its factorization.

12011111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715901 (or 1715887 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 12011111000 its reverse (11111021), we get a palindrome (12022222021).

The spelling of 12011111000 in words is "twelve billion, eleven million, one hundred eleven thousand".