2121666712 has 16 divisors (see below), whose sum is σ = 4339773000. Its totient is φ = 964393920.

The previous prime is 2121666683. The next prime is 2121666721. The reversal of 2121666712 is 2176661212.

It is a congruent number.

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, 12054837 + ... + 12055012.

Almost surely, 2^2121666712 is an apocalyptic number.

2121666712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121666712 is an abundant number, since it is smaller than the sum of its proper divisors (2218106288).

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

2121666712 is a wasteful number, since it uses less digits than its factorization.

2121666712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24109866 (or 24109862 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 2121666712 is about 46061.5535126639. The cubic root of 2121666712 is about 1284.9682222001.

The spelling of 2121666712 in words is "two billion, one hundred twenty-one million, six hundred sixty-six thousand, seven hundred twelve".