12281220873 has 24 divisors (see below), whose sum is σ = 17895477600. Its totient is φ = 8115698304.

The previous prime is 12281220857. The next prime is 12281220877. The reversal of 12281220873 is 37802218221.

It is not a de Polignac number, because 12281220873 - 2⁴ = 12281220857 is a prime.

It is a super-2 number, since 2×12281220873² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12281220877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 816961 + ... + 831857.

It is an arithmetic number, because the mean of its divisors is an integer number (745644900).

Almost surely, 2^12281220873 is an apocalyptic number.

It is an amenable number.

12281220873 is a deficient number, since it is larger than the sum of its proper divisors (5614256727).

12281220873 is a wasteful number, since it uses less digits than its factorization.

12281220873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701 (or 15698 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 12281220873 in words is "twelve billion, two hundred eighty-one million, two hundred twenty thousand, eight hundred seventy-three".