12111012 has 24 divisors (see below), whose sum is σ = 31399200. Its totient is φ = 4036968.

The previous prime is 12110971. The next prime is 12111017. The reversal of 12111012 is 21011121.

It is a happy number.

It is a super-2 number, since 2×12111012² = 293353223328288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12110985 and 12111003.

It is not an unprimeable number, because it can be changed into a prime (12111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55962 + ... + 56177.

It is an arithmetic number, because the mean of its divisors is an integer number (1308300).

Almost surely, 2^12111012 is an apocalyptic number.

12111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111012 is an abundant number, since it is smaller than the sum of its proper divisors (19288188).

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

12111012 is a wasteful number, since it uses less digits than its factorization.

12111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112152 (or 112144 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12111012 is about 3480.0879299236. The cubic root of 12111012 is about 229.6466660437.

Adding to 12111012 its reverse (21011121), we get a palindrome (33122133).

The spelling of 12111012 in words is "twelve million, one hundred eleven thousand, twelve".