211120199987 has 16 divisors (see below), whose sum is σ = 231644643840. Its totient is φ = 191698407648.

The previous prime is 211120199959. The next prime is 211120200001. The reversal of 211120199987 is 789991021112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211120199987 - 2⁶ = 211120199923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211120199287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2194043 + ... + 2288244.

It is an arithmetic number, because the mean of its divisors is an integer number (14477790240).

Almost surely, 2^211120199987 is an apocalyptic number.

211120199987 is a deficient number, since it is larger than the sum of its proper divisors (20524443853).

211120199987 is a wasteful number, since it uses less digits than its factorization.

211120199987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482410.

The product of its (nonzero) digits is 163296, while the sum is 50.

The spelling of 211120199987 in words is "two hundred eleven billion, one hundred twenty million, one hundred ninety-nine thousand, nine hundred eighty-seven".