12111012012 has 24 divisors (see below), whose sum is σ = 30828030912. Its totient is φ = 3670003600.

The previous prime is 12111011999. The next prime is 12111012059. The reversal of 12111012012 is 21021011121.

It is a super-2 number, since 2×12111012012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45874914 + ... + 45875177.

It is an arithmetic number, because the mean of its divisors is an integer number (1284501288).

Almost surely, 2^12111012012 is an apocalyptic number.

12111012012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111012012 is an abundant number, since it is smaller than the sum of its proper divisors (18717018900).

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

12111012012 is a wasteful number, since it uses less digits than its factorization.

12111012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750109 (or 91750107 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12111012012 its reverse (21021011121), we get a palindrome (33132023133).

The spelling of 12111012012 in words is "twelve billion, one hundred eleven million, twelve thousand, twelve".