12001125545 has 8 divisors (see below), whose sum is σ = 14401959624. Its totient is φ = 9600494464.

The previous prime is 12001125481. The next prime is 12001125547. The reversal of 12001125545 is 54552110021.

It can be written as a sum of positive squares in 4 ways, for example, as 1388829289 + 10612296256 = 37267^2 + 103016^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12001125545 - 2⁶ = 12001125481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001125547) 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, 155597 + ... + 219573.

It is an arithmetic number, because the mean of its divisors is an integer number (1800244953).

Almost surely, 2^12001125545 is an apocalyptic number.

It is an amenable number.

12001125545 is a deficient number, since it is larger than the sum of its proper divisors (2400834079).

12001125545 is an equidigital number, since it uses as much as digits as its factorization.

12001125545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101499.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 12001125545 its reverse (54552110021), we get a palindrome (66553235566).

The spelling of 12001125545 in words is "twelve billion, one million, one hundred twenty-five thousand, five hundred forty-five".