12340212203440 has 40 divisors (see below), whose sum is σ = 31299265500048. Its totient is φ = 4487349891840.

The previous prime is 12340212203357. The next prime is 12340212203461. The reversal of 12340212203440 is 4430221204321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 12340212203399 and 12340212203408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7011483327 + ... + 7011485086.

Almost surely, 2^{12340212203440} is an apocalyptic number.

12340212203440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12340212203440 is an abundant number, since it is smaller than the sum of its proper divisors (18959053296608).

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

12340212203440 is a wasteful number, since it uses less digits than its factorization.

12340212203440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022968437 (or 14022968431 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12340212203440 its reverse (4430221204321), we get a palindrome (16770433407761).

The spelling of 12340212203440 in words is "twelve trillion, three hundred forty billion, two hundred twelve million, two hundred three thousand, four hundred forty".