12155443203 has 8 divisors (see below), whose sum is σ = 16291233808. Its totient is φ = 8061640704.

The previous prime is 12155443193. The next prime is 12155443229. The reversal of 12155443203 is 30234455121.

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

It is not a de Polignac number, because 12155443203 - 2¹⁰ = 12155442179 is a prime.

It is a super-2 number, since 2×12155443203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155443243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10496350 + ... + 10497507.

It is an arithmetic number, because the mean of its divisors is an integer number (2036404226).

Almost surely, 2^12155443203 is an apocalyptic number.

12155443203 is a deficient number, since it is larger than the sum of its proper divisors (4135790605).

12155443203 is a wasteful number, since it uses less digits than its factorization.

12155443203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20994053.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 12155443203 its reverse (30234455121), we get a palindrome (42389898324).

The spelling of 12155443203 in words is "twelve billion, one hundred fifty-five million, four hundred forty-three thousand, two hundred three".