12021243012 has 36 divisors (see below), whose sum is σ = 30391111296. Its totient is φ = 4006542960.

The previous prime is 12021242993. The next prime is 12021243037. The reversal of 12021243012 is 21034212021.

It is a happy number.

12021243012 is a `hidden beast` number, since 1 + 20 + 212 + 430 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321813 + ... + 357219.

It is an arithmetic number, because the mean of its divisors is an integer number (844197536).

Almost surely, 2^12021243012 is an apocalyptic number.

12021243012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021243012 is an abundant number, since it is smaller than the sum of its proper divisors (18369868284).

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

12021243012 is a wasteful number, since it uses less digits than its factorization.

12021243012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44848 (or 44843 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12021243012 its reverse (21034212021), we get a palindrome (33055455033).

The spelling of 12021243012 in words is "twelve billion, twenty-one million, two hundred forty-three thousand, twelve".