12012454545 has 64 divisors (see below), whose sum is σ = 23872611840. Its totient is φ = 5022425088.

The previous prime is 12012454543. The next prime is 12012454547. The reversal of 12012454545 is 54545421021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12012454543) and next prime (12012454547).

It is not a de Polignac number, because 12012454545 - 2¹ = 12012454543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12012454543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108417 + ... + 189153.

It is an arithmetic number, because the mean of its divisors is an integer number (373009560).

Almost surely, 2^12012454545 is an apocalyptic number.

12012454545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12012454545 is a deficient number, since it is larger than the sum of its proper divisors (11860157295).

12012454545 is a wasteful number, since it uses less digits than its factorization.

12012454545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80874.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 12012454545 its reverse (54545421021), we get a palindrome (66557875566).

The spelling of 12012454545 in words is "twelve billion, twelve million, four hundred fifty-four thousand, five hundred forty-five".