12154845121 has 16 divisors (see below), whose sum is σ = 12854016000. Its totient is φ = 11470135248.

The previous prime is 12154845107. The next prime is 12154845151.

12154845121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12154845121 - 2⁷ = 12154844993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12154845151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3812290 + ... + 3815476.

It is an arithmetic number, because the mean of its divisors is an integer number (803376000).

Almost surely, 2^12154845121 is an apocalyptic number.

It is an amenable number.

12154845121 is a deficient number, since it is larger than the sum of its proper divisors (699170879).

12154845121 is a wasteful number, since it uses less digits than its factorization.

12154845121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388.

The product of its digits is 12800, while the sum is 34.

The spelling of 12154845121 in words is "twelve billion, one hundred fifty-four million, eight hundred forty-five thousand, one hundred twenty-one".