201218213166 has 16 divisors (see below), whose sum is σ = 410998904064. Its totient is φ = 65645658104.

The previous prime is 201218213159. The next prime is 201218213173. The reversal of 201218213166 is 661312812102.

201218213166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201218213159) and next prime (201218213173).

It is a congruent number.

It is an unprimeable number.

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, 356769600 + ... + 356770163.

It is an arithmetic number, because the mean of its divisors is an integer number (25687431504).

Almost surely, 2^201218213166 is an apocalyptic number.

201218213166 is an abundant number, since it is smaller than the sum of its proper divisors (209780690898).

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

201218213166 is a wasteful number, since it uses less digits than its factorization.

201218213166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713539815.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 201218213166 in words is "two hundred one billion, two hundred eighteen million, two hundred thirteen thousand, one hundred sixty-six".