12021021112 has 32 divisors (see below), whose sum is σ = 22616426880. Its totient is φ = 5990012640.

The previous prime is 12021021091. The next prime is 12021021119. The reversal of 12021021112 is 21112012021.

It is a junction number, because it is equal to n+sod(n) for n = 12021021092 and 12021021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021021119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441687 + ... + 3445177.

It is an arithmetic number, because the mean of its divisors is an integer number (706763340).

Almost surely, 2^12021021112 is an apocalyptic number.

It is an amenable number.

12021021112 is a deficient number, since it is larger than the sum of its proper divisors (10595405768).

12021021112 is a wasteful number, since it uses less digits than its factorization.

12021021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4843 (or 4839 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021021112 its reverse (21112012021), we get a palindrome (33133033133).

Subtracting 12021021112 from its reverse (21112012021), we obtain a palindrome (9090990909).

The spelling of 12021021112 in words is "twelve billion, twenty-one million, twenty-one thousand, one hundred twelve".