12340212531 has 12 divisors (see below), whose sum is σ = 16606000152. Its totient is φ = 8151309504.

The previous prime is 12340212529. The next prime is 12340212551. The reversal of 12340212531 is 13521204321.

It is not a de Polignac number, because 12340212531 - 2¹ = 12340212529 is a prime.

It is a super-2 number, since 2×12340212531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12340212551) 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 11 ways as a sum of consecutive naturals, for example, 137466 + ... + 208751.

It is an arithmetic number, because the mean of its divisors is an integer number (1383833346).

Almost surely, 2^12340212531 is an apocalyptic number.

12340212531 is a deficient number, since it is larger than the sum of its proper divisors (4265787621).

12340212531 is an equidigital number, since it uses as much as digits as its factorization.

12340212531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346438 (or 346329 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12340212531 its reverse (13521204321), we get a palindrome (25861416852).

The spelling of 12340212531 in words is "twelve billion, three hundred forty million, two hundred twelve thousand, five hundred thirty-one".