12021531430 has 16 divisors (see below), whose sum is σ = 22005516240. Its totient is φ = 4727110432.

The previous prime is 12021531413. The next prime is 12021531437. The reversal of 12021531430 is 3413512021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021531437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10187149 + ... + 10188328.

It is an arithmetic number, because the mean of its divisors is an integer number (1375344765).

Almost surely, 2^12021531430 is an apocalyptic number.

12021531430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021531430 is a deficient number, since it is larger than the sum of its proper divisors (9983984810).

12021531430 is a wasteful number, since it uses less digits than its factorization.

12021531430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20375543.

The product of its (nonzero) digits is 720, while the sum is 22.

The spelling of 12021531430 in words is "twelve billion, twenty-one million, five hundred thirty-one thousand, four hundred thirty".