12260827781 has 4 divisors (see below), whose sum is σ = 12262776864. Its totient is φ = 12258878700.

The previous prime is 12260827723. The next prime is 12260827793. The reversal of 12260827781 is 18772806221.

12260827781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12260827781 - 2¹⁸ = 12260565637 is a prime.

It is a super-3 number, since 3×12260827781³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12260827721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965075 + ... + 977696.

It is an arithmetic number, because the mean of its divisors is an integer number (3065694216).

Almost surely, 2^12260827781 is an apocalyptic number.

It is an amenable number.

12260827781 is a deficient number, since it is larger than the sum of its proper divisors (1949083).

12260827781 is an equidigital number, since it uses as much as digits as its factorization.

12260827781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949082.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 12260827781 in words is "twelve billion, two hundred sixty million, eight hundred twenty-seven thousand, seven hundred eighty-one".