13155212123145 has 32 divisors (see below), whose sum is σ = 23491918464000. Its totient is φ = 6984650725632.

The previous prime is 13155212123143. The next prime is 13155212123213. The reversal of 13155212123145 is 54132121255131.

13155212123145 is a `hidden beast` number, since 1 + 3 + 1 + 5 + 521 + 2 + 123 + 1 + 4 + 5 = 666.

It is not a de Polignac number, because 13155212123145 - 2¹ = 13155212123143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13155212123143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218458720 + ... + 218518929.

It is an arithmetic number, because the mean of its divisors is an integer number (734122452000).

Almost surely, 2^{13155212123145} is an apocalyptic number.

13155212123145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13155212123145 is a deficient number, since it is larger than the sum of its proper divisors (10336706340855).

13155212123145 is a wasteful number, since it uses less digits than its factorization.

13155212123145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436977886 (or 436977880 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

Adding to 13155212123145 its reverse (54132121255131), we get a palindrome (67287333378276).

The spelling of 13155212123145 in words is "thirteen trillion, one hundred fifty-five billion, two hundred twelve million, one hundred twenty-three thousand, one hundred forty-five".