2121380705 has 8 divisors (see below), whose sum is σ = 2604858432. Its totient is φ = 1657636848.

The previous prime is 2121380693. The next prime is 2121380719. The reversal of 2121380705 is 5070831212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121380705 - 2⁶ = 2121380641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4933229 + ... + 4933658.

It is an arithmetic number, because the mean of its divisors is an integer number (325607304).

Almost surely, 2^2121380705 is an apocalyptic number.

It is an amenable number.

2121380705 is a deficient number, since it is larger than the sum of its proper divisors (483477727).

2121380705 is an equidigital number, since it uses as much as digits as its factorization.

2121380705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866935.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2121380705 is about 46058.4487906399. The cubic root of 2121380705 is about 1284.9104804227.

The spelling of 2121380705 in words is "two billion, one hundred twenty-one million, three hundred eighty thousand, seven hundred five".