12281293988 has 12 divisors (see below), whose sum is σ = 21571573632. Its totient is φ = 6117987240.

The previous prime is 12281293979. The next prime is 12281293991. The reversal of 12281293988 is 88939218221.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5663720 + ... + 5665887.

It is an arithmetic number, because the mean of its divisors is an integer number (1797631136).

Almost surely, 2^12281293988 is an apocalyptic number.

It is an amenable number.

12281293988 is a deficient number, since it is larger than the sum of its proper divisors (9290279644).

12281293988 is a wasteful number, since it uses less digits than its factorization.

12281293988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11329882 (or 11329880 counting only the distinct ones).

The product of its digits is 995328, while the sum is 53.

Adding to 12281293988 its sum of digits (53), we get a square (12281294041 = 110821²).

The spelling of 12281293988 in words is "twelve billion, two hundred eighty-one million, two hundred ninety-three thousand, nine hundred eighty-eight".