12520200340240 has 40 divisors (see below), whose sum is σ = 29113339673880. Its totient is φ = 5007413661696.

The previous prime is 12520200340237. The next prime is 12520200340243. The reversal of 12520200340240 is 4204300202521.

It is an interprime number because it is at equal distance from previous prime (12520200340237) and next prime (12520200340243).

It can be written as a sum of positive squares in 4 ways, for example, as 7854185611024 + 4666014729216 = 2802532^2 + 2160096^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12520200340243) 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, 9808545 + ... + 11011264.

It is an arithmetic number, because the mean of its divisors is an integer number (727833491847).

Almost surely, 2^{12520200340240} is an apocalyptic number.

12520200340240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12520200340240 is an abundant number, since it is smaller than the sum of its proper divisors (16593139333640).

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

12520200340240 is a wasteful number, since it uses less digits than its factorization.

12520200340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20827339 (or 20827333 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 12520200340240 its reverse (4204300202521), we get a palindrome (16724500542761).

The spelling of 12520200340240 in words is "twelve trillion, five hundred twenty billion, two hundred million, three hundred forty thousand, two hundred forty".