12009621045 has 16 divisors (see below), whose sum is σ = 19322746560. Its totient is φ = 6369346944.

The previous prime is 12009621037. The next prime is 12009621047. The reversal of 12009621045 is 54012690021.

12009621045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12009621045 - 2³ = 12009621037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009621047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2233744 + ... + 2239113.

It is an arithmetic number, because the mean of its divisors is an integer number (1207671660).

Almost surely, 2^12009621045 is an apocalyptic number.

12009621045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12009621045 is a deficient number, since it is larger than the sum of its proper divisors (7313125515).

12009621045 is a wasteful number, since it uses less digits than its factorization.

12009621045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473044.

The product of its (nonzero) digits is 4320, while the sum is 30.

It can be divided in two parts, 120096 and 21045, that added together give a palindrome (141141).

The spelling of 12009621045 in words is "twelve billion, nine million, six hundred twenty-one thousand, forty-five".