12500134212340 has 12 divisors (see below), whose sum is σ = 26250281845956. Its totient is φ = 5000053684928.

The previous prime is 12500134212271. The next prime is 12500134212341. The reversal of 12500134212340 is 4321243100521.

It can be written as a sum of positive squares in 2 ways, for example, as 5596924471524 + 6903209740816 = 2365782^2 + 2627396^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12500134212299 and 12500134212308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500134212341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312503355289 + ... + 312503355328.

It is an arithmetic number, because the mean of its divisors is an integer number (2187523487163).

Almost surely, 2^{12500134212340} is an apocalyptic number.

12500134212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500134212340 is an abundant number, since it is smaller than the sum of its proper divisors (13750147633616).

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

12500134212340 is a wasteful number, since it uses less digits than its factorization.

12500134212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625006710626 (or 625006710624 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 12500134212340 its reverse (4321243100521), we get a palindrome (16821377312861).

The spelling of 12500134212340 in words is "twelve trillion, five hundred billion, one hundred thirty-four million, two hundred twelve thousand, three hundred forty".