12261272370 has 32 divisors (see below), whose sum is σ = 29468033280. Its totient is φ = 3265119360.

The previous prime is 12261272357. The next prime is 12261272371. The reversal of 12261272370 is 7327216221.

12261272370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12261272371) 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 15 ways as a sum of consecutive naturals, for example, 262651 + ... + 305790.

It is an arithmetic number, because the mean of its divisors is an integer number (920876040).

Almost surely, 2^12261272370 is an apocalyptic number.

12261272370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12261272370 is an abundant number, since it is smaller than the sum of its proper divisors (17206760910).

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

12261272370 is a wasteful number, since it uses less digits than its factorization.

12261272370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569170.

The product of its (nonzero) digits is 14112, while the sum is 33.

Adding to 12261272370 its reverse (7327216221), we get a palindrome (19588488591).

The spelling of 12261272370 in words is "twelve billion, two hundred sixty-one million, two hundred seventy-two thousand, three hundred seventy".