2121140866 has 8 divisors (see below), whose sum is σ = 3426458364. Its totient is φ = 978988080.

The previous prime is 2121140843. The next prime is 2121140887. The reversal of 2121140866 is 6680411212.

It can be written as a sum of positive squares in 2 ways, for example, as 2121063025 + 77841 = 46055^2 + 279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 40791145 + ... + 40791196.

Almost surely, 2^2121140866 is an apocalyptic number.

2121140866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2121140866 is a deficient number, since it is larger than the sum of its proper divisors (1305317498).

2121140866 is a wasteful number, since it uses less digits than its factorization.

2121140866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81582356.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2121140866 is about 46055.8450796422. The cubic root of 2121140866 is about 1284.8620554734.

The spelling of 2121140866 in words is "two billion, one hundred twenty-one million, one hundred forty thousand, eight hundred sixty-six".