211211020987 has 8 divisors (see below), whose sum is σ = 225519554304. Its totient is φ = 197329608168.

The previous prime is 211211020981. The next prime is 211211020991. The reversal of 211211020987 is 789020112112.

211211020987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211211020987 - 2¹¹ = 211211018939 is a prime.

It is a super-2 number, since 2×211211020987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211020981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106779103 + ... + 106781080.

It is an arithmetic number, because the mean of its divisors is an integer number (28189944288).

Almost surely, 2^211211020987 is an apocalyptic number.

211211020987 is a deficient number, since it is larger than the sum of its proper divisors (14308533317).

211211020987 is a wasteful number, since it uses less digits than its factorization.

211211020987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213560249.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 211211020987 in words is "two hundred eleven billion, two hundred eleven million, twenty thousand, nine hundred eighty-seven".