12021434144500 has 96 divisors (see below), whose sum is σ = 28644289914240. Its totient is φ = 4371022080000.

The previous prime is 12021434144483. The next prime is 12021434144527. The reversal of 12021434144500 is 544143412021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62213035 + ... + 62405965.

It is an arithmetic number, because the mean of its divisors is an integer number (298378019940).

Almost surely, 2^{12021434144500} is an apocalyptic number.

12021434144500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021434144500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14322144957120).

12021434144500 is an abundant number, since it is smaller than the sum of its proper divisors (16622855769740).

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

12021434144500 is a wasteful number, since it uses less digits than its factorization.

12021434144500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204290 (or 204278 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 12021434144500 its reverse (544143412021), we get a palindrome (12565577556521).

The spelling of 12021434144500 in words is "twelve trillion, twenty-one billion, four hundred thirty-four million, one hundred forty-four thousand, five hundred".