12261555210 has 16 divisors (see below), whose sum is σ = 29427732576. Its totient is φ = 3269748048.

The previous prime is 12261555203. The next prime is 12261555239. The reversal of 12261555210 is 1255516221.

12261555210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 408718507 = 12261555210 / (1 + 2 + 2 + 6 + 1 + 5 + 5 + 5 + 2 + 1 + 0).

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 204359224 + ... + 204359283.

It is an arithmetic number, because the mean of its divisors is an integer number (1839233286).

Almost surely, 2^12261555210 is an apocalyptic number.

12261555210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12261555210 is an abundant number, since it is smaller than the sum of its proper divisors (17166177366).

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

12261555210 is a wasteful number, since it uses less digits than its factorization.

12261555210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408718517.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 12261555210 in words is "twelve billion, two hundred sixty-one million, five hundred fifty-five thousand, two hundred ten".