201212101987 has 8 divisors (see below), whose sum is σ = 221729257904. Its totient is φ = 181414846368.

The previous prime is 201212101939. The next prime is 201212102011. The reversal of 201212101987 is 789101212102.

201212101987 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 a de Polignac number, because none of the positive numbers 2^k-201212101987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212101787) 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, 179974488 + ... + 179975605.

It is an arithmetic number, because the mean of its divisors is an integer number (27716157238).

Almost surely, 2^201212101987 is an apocalyptic number.

201212101987 is a deficient number, since it is larger than the sum of its proper divisors (20517155917).

201212101987 is a wasteful number, since it uses less digits than its factorization.

201212101987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359950149.

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

The spelling of 201212101987 in words is "two hundred one billion, two hundred twelve million, one hundred one thousand, nine hundred eighty-seven".