12126605988 has 96 divisors (see below), whose sum is σ = 34266758400. Its totient is φ = 3258372096.

The previous prime is 12126605929. The next prime is 12126605993. The reversal of 12126605988 is 88950662121.

It is a super-2 number, since 2×12126605988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2437968 + ... + 2442936.

It is an arithmetic number, because the mean of its divisors is an integer number (356945400).

Almost surely, 2^12126605988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12126605988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17133379200).

12126605988 is an abundant number, since it is smaller than the sum of its proper divisors (22140152412).

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

12126605988 is a wasteful number, since it uses less digits than its factorization.

12126605988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709 (or 6707 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 12126605988 in words is "twelve billion, one hundred twenty-six million, six hundred five thousand, nine hundred eighty-eight".