12781212280 has 32 divisors (see below), whose sum is σ = 28767895200. Its totient is φ = 5110677376.

The previous prime is 12781212271. The next prime is 12781212281. The reversal of 12781212280 is 8221218721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781212281) 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 7 ways as a sum of consecutive naturals, for example, 61086 + ... + 171154.

It is an arithmetic number, because the mean of its divisors is an integer number (898996725).

Almost surely, 2^12781212280 is an apocalyptic number.

12781212280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12781212280 is an abundant number, since it is smaller than the sum of its proper divisors (15986682920).

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

12781212280 is a wasteful number, since it uses less digits than its factorization.

12781212280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112983 (or 112979 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The spelling of 12781212280 in words is "twelve billion, seven hundred eighty-one million, two hundred twelve thousand, two hundred eighty".