12012454531 has 16 divisors (see below), whose sum is σ = 15764808960. Its totient is φ = 8867702880.

The previous prime is 12012454499. The next prime is 12012454543. The reversal of 12012454531 is 13545421021.

It is a cyclic number.

It is not a de Polignac number, because 12012454531 - 2⁵ = 12012454499 is a prime.

It is a super-2 number, since 2×12012454531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012454531.

It is not an unprimeable number, because it can be changed into a prime (12012454561) 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 15 ways as a sum of consecutive naturals, for example, 4103956 + ... + 4106881.

It is an arithmetic number, because the mean of its divisors is an integer number (985300560).

Almost surely, 2^12012454531 is an apocalyptic number.

12012454531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12012454531 is a deficient number, since it is larger than the sum of its proper divisors (3752354429).

12012454531 is a wasteful number, since it uses less digits than its factorization.

12012454531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210874.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 12012454531 its reverse (13545421021), we get a palindrome (25557875552).

The spelling of 12012454531 in words is "twelve billion, twelve million, four hundred fifty-four thousand, five hundred thirty-one".