12921312270 has 32 divisors (see below), whose sum is σ = 31018337280. Its totient is φ = 3444884640.

The previous prime is 12921312233. The next prime is 12921312277. The reversal of 12921312270 is 7221312921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921312277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87915 + ... + 183225.

It is an arithmetic number, because the mean of its divisors is an integer number (969323040).

Almost surely, 2^12921312270 is an apocalyptic number.

12921312270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12921312270 is an abundant number, since it is smaller than the sum of its proper divisors (18097025010).

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

12921312270 is a wasteful number, since it uses less digits than its factorization.

12921312270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99840.

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 12921312270 in words is "twelve billion, nine hundred twenty-one million, three hundred twelve thousand, two hundred seventy".