12121660000 has 60 divisors (see below), whose sum is σ = 29821151052. Its totient is φ = 4848656000.

The previous prime is 12121659989. The next prime is 12121660013. The reversal of 12121660000 is 6612121.

It is a self number, because there is not a number n which added to its sum of digits gives 12121660000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 283042 + ... + 323041.

Almost surely, 2^12121660000 is an apocalyptic number.

12121660000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121660000 is an abundant number, since it is smaller than the sum of its proper divisors (17699491052).

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

12121660000 is an frugal number, since it uses more digits than its factorization.

12121660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606113 (or 606090 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 12121660000 in words is "twelve billion, one hundred twenty-one million, six hundred sixty thousand".