12143043054534 has 128 divisors (see below), whose sum is σ = 29653685452800. Its totient is φ = 3237910536960.

The previous prime is 12143043054533. The next prime is 12143043054547. The reversal of 12143043054534 is 43545034034121.

It is a junction number, because it is equal to n+sod(n) for n = 12143043054492 and 12143043054501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143043054533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18931509 + ... + 19562415.

It is an arithmetic number, because the mean of its divisors is an integer number (231669417600).

Almost surely, 2^{12143043054534} is an apocalyptic number.

12143043054534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12143043054534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14826842726400).

12143043054534 is an abundant number, since it is smaller than the sum of its proper divisors (17510642398266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12143043054534 is a wasteful number, since it uses less digits than its factorization.

12143043054534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631298.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 12143043054534 its reverse (43545034034121), we get a palindrome (55688077088655).

The spelling of 12143043054534 in words is "twelve trillion, one hundred forty-three billion, forty-three million, fifty-four thousand, five hundred thirty-four".