12403134121240 has 32 divisors (see below), whose sum is σ = 28167865350480. Its totient is φ = 4914886790272.

The previous prime is 12403134121219. The next prime is 12403134121241. The reversal of 12403134121240 is 4212143130421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12403134121199 and 12403134121208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403134121241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448959987 + ... + 1448968546.

Almost surely, 2^{12403134121240} is an apocalyptic number.

12403134121240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12403134121240 is an abundant number, since it is smaller than the sum of its proper divisors (15764731229240).

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

12403134121240 is a wasteful number, since it uses less digits than its factorization.

12403134121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897928651 (or 2897928647 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 12403134121240 its reverse (4212143130421), we get a palindrome (16615277251661).

The spelling of 12403134121240 in words is "twelve trillion, four hundred three billion, one hundred thirty-four million, one hundred twenty-one thousand, two hundred forty".