12511321203340 has 48 divisors (see below), whose sum is σ = 26509142499840. Its totient is φ = 4959822605760.

The previous prime is 12511321203317. The next prime is 12511321203343. The reversal of 12511321203340 is 4330212311521.

It is a junction number, because it is equal to n+sod(n) for n = 12511321203299 and 12511321203308.

It is not an unprimeable number, because it can be changed into a prime (12511321203343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2353492 + ... + 5528251.

It is an arithmetic number, because the mean of its divisors is an integer number (552273802080).

Almost surely, 2^{12511321203340} is an apocalyptic number.

12511321203340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511321203340 is an abundant number, since it is smaller than the sum of its proper divisors (13997821296500).

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

12511321203340 is a wasteful number, since it uses less digits than its factorization.

12511321203340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7882462 (or 7882460 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12511321203340 its reverse (4330212311521), we get a palindrome (16841533514861).

The spelling of 12511321203340 in words is "twelve trillion, five hundred eleven billion, three hundred twenty-one million, two hundred three thousand, three hundred forty".