201212101986 has 16 divisors (see below), whose sum is σ = 459913376064. Its totient is φ = 57489171984.

The previous prime is 201212101939. The next prime is 201212102011. The reversal of 201212101986 is 689101212102.

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, 2395382125 + ... + 2395382208.

It is an arithmetic number, because the mean of its divisors is an integer number (28744586004).

Almost surely, 2^201212101986 is an apocalyptic number.

201212101986 is an abundant number, since it is smaller than the sum of its proper divisors (258701274078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201212101986 is a wasteful number, since it uses less digits than its factorization.

201212101986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790764345.

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 201212101986 in words is "two hundred one billion, two hundred twelve million, one hundred one thousand, nine hundred eighty-six".