211202111987 has 2 divisors, whose sum is σ = 211202111988. Its totient is φ = 211202111986.

The previous prime is 211202111969. The next prime is 211202112019. The reversal of 211202111987 is 789111202112.

211202111987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211202111987 is a prime.

It is not a weakly prime, because it can be changed into another prime (211202111917) 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 as a sum of consecutive naturals, namely, 105601055993 + 105601055994.

It is an arithmetic number, because the mean of its divisors is an integer number (105601055994).

Almost surely, 2^211202111987 is an apocalyptic number.

211202111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

211202111987 is an equidigital number, since it uses as much as digits as its factorization.

211202111987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 211202111987 in words is "two hundred eleven billion, two hundred two million, one hundred eleven thousand, nine hundred eighty-seven".