2111209985 has 8 divisors (see below), whose sum is σ = 2666791680. Its totient is φ = 1600074864.

The previous prime is 2111209949. The next prime is 2111210009. The reversal of 2111209985 is 5899021112.

It is a happy number.

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 2111209985 - 2¹⁸ = 2110947841 is a prime.

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, 11111537 + ... + 11111726.

It is an arithmetic number, because the mean of its divisors is an integer number (333348960).

Almost surely, 2^2111209985 is an apocalyptic number.

It is an amenable number.

2111209985 is a deficient number, since it is larger than the sum of its proper divisors (555581695).

2111209985 is a wasteful number, since it uses less digits than its factorization.

2111209985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223287.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 2111209985 is about 45947.9051209084. The cubic root of 2111209985 is about 1282.8537372852.

The spelling of 2111209985 in words is "two billion, one hundred eleven million, two hundred nine thousand, nine hundred eighty-five".