12012120545 has 8 divisors (see below), whose sum is σ = 14417044200. Its totient is φ = 9608030080.

The previous prime is 12012120541. The next prime is 12012120607. The reversal of 12012120545 is 54502121021.

It can be written as a sum of positive squares in 4 ways, for example, as 102981904 + 11909138641 = 10148^2 + 109129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12012120545 - 2² = 12012120541 is a prime.

It is a super-2 number, since 2×12012120545² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012120545.

It is not an unprimeable number, because it can be changed into a prime (12012120541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176126 + ... + 234615.

It is an arithmetic number, because the mean of its divisors is an integer number (1802130525).

Almost surely, 2^12012120545 is an apocalyptic number.

It is an amenable number.

12012120545 is a deficient number, since it is larger than the sum of its proper divisors (2404923655).

12012120545 is an equidigital number, since it uses as much as digits as its factorization.

12012120545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416595.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12012120545 its reverse (54502121021), we get a palindrome (66514241566).

The spelling of 12012120545 in words is "twelve billion, twelve million, one hundred twenty thousand, five hundred forty-five".