12891122988 has 48 divisors (see below), whose sum is σ = 30679488000. Its totient is φ = 4212082368.

The previous prime is 12891122971. The next prime is 12891122999. The reversal of 12891122988 is 88922119821.

It is a self number, because there is not a number n which added to its sum of digits gives 12891122988.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82858 + ... + 180686.

It is an arithmetic number, because the mean of its divisors is an integer number (639156000).

Almost surely, 2^12891122988 is an apocalyptic number.

It is an amenable number.

12891122988 is an abundant number, since it is smaller than the sum of its proper divisors (17788365012).

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

12891122988 is a wasteful number, since it uses less digits than its factorization.

12891122988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98054 (or 98052 counting only the distinct ones).

The product of its digits is 331776, while the sum is 51.

The spelling of 12891122988 in words is "twelve billion, eight hundred ninety-one million, one hundred twenty-two thousand, nine hundred eighty-eight".