12821872281 has 8 divisors (see below), whose sum is σ = 17181739200. Its totient is φ = 8504960112.

The previous prime is 12821872241. The next prime is 12821872303. The reversal of 12821872281 is 18227812821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12821872281 - 2³¹ = 10674388633 is a prime.

It is a super-3 number, since 3×12821872281³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12821872241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10737990 + ... + 10739183.

It is an arithmetic number, because the mean of its divisors is an integer number (2147717400).

Almost surely, 2^12821872281 is an apocalyptic number.

It is an amenable number.

12821872281 is a deficient number, since it is larger than the sum of its proper divisors (4359866919).

12821872281 is a wasteful number, since it uses less digits than its factorization.

12821872281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21477375.

The product of its digits is 57344, while the sum is 42.

The spelling of 12821872281 in words is "twelve billion, eight hundred twenty-one million, eight hundred seventy-two thousand, two hundred eighty-one".