12021004240 has 40 divisors (see below), whose sum is σ = 31941527040. Its totient is φ = 4121486976.

The previous prime is 12021004231. The next prime is 12021004267. The reversal of 12021004240 is 4240012021.

12021004240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10732480 + ... + 10733599.

It is an arithmetic number, because the mean of its divisors is an integer number (798538176).

Almost surely, 2^12021004240 is an apocalyptic number.

12021004240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021004240 is an abundant number, since it is smaller than the sum of its proper divisors (19920522800).

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

12021004240 is a wasteful number, since it uses less digits than its factorization.

12021004240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21466099 (or 21466093 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12021004240 its reverse (4240012021), we get a palindrome (16261016261).

The spelling of 12021004240 in words is "twelve billion, twenty-one million, four thousand, two hundred forty".