12123143355 has 16 divisors (see below), whose sum is σ = 19715014944. Its totient is φ = 6359681280.

The previous prime is 12123143353. The next prime is 12123143359. The reversal of 12123143355 is 55334132121.

It is not a de Polignac number, because 12123143355 - 2¹ = 12123143353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12123143353) 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, 6623754 + ... + 6625583.

It is an arithmetic number, because the mean of its divisors is an integer number (1232188434).

Almost surely, 2^12123143355 is an apocalyptic number.

12123143355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12123143355 is a deficient number, since it is larger than the sum of its proper divisors (7591871589).

12123143355 is a wasteful number, since it uses less digits than its factorization.

12123143355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13249406.

The product of its digits is 10800, while the sum is 30.

Adding to 12123143355 its reverse (55334132121), we get a palindrome (67457275476).

The spelling of 12123143355 in words is "twelve billion, one hundred twenty-three million, one hundred forty-three thousand, three hundred fifty-five".