12155545213 has 16 divisors (see below), whose sum is σ = 14501425024. Its totient is φ = 9971242560.

The previous prime is 12155545201. The next prime is 12155545223. The reversal of 12155545213 is 31254555121.

It is a cyclic number.

It is not a de Polignac number, because 12155545213 - 2⁹ = 12155544701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155545223) 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, 368895 + ... + 400492.

It is an arithmetic number, because the mean of its divisors is an integer number (906339064).

Almost surely, 2^12155545213 is an apocalyptic number.

It is an amenable number.

12155545213 is a deficient number, since it is larger than the sum of its proper divisors (2345879811).

12155545213 is an equidigital number, since it uses as much as digits as its factorization.

12155545213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769492.

The product of its digits is 30000, while the sum is 34.

The spelling of 12155545213 in words is "twelve billion, one hundred fifty-five million, five hundred forty-five thousand, two hundred thirteen".