201216050109 has 12 divisors (see below), whose sum is σ = 290858976252. Its totient is φ = 134045462400.

The previous prime is 201216050107. The next prime is 201216050149. The reversal of 201216050109 is 901050612102.

201216050109 is a `hidden beast` number, since 20 + 1 + 21 + 605 + 0 + 10 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 115705424025 + 85510626084 = 340155^2 + 292422^2 .

It is not a de Polignac number, because 201216050109 - 2¹ = 201216050107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201216050107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8201322 + ... + 8225819.

It is an arithmetic number, because the mean of its divisors is an integer number (24238248021).

Almost surely, 2^201216050109 is an apocalyptic number.

It is an amenable number.

201216050109 is a deficient number, since it is larger than the sum of its proper divisors (89642926143).

201216050109 is a wasteful number, since it uses less digits than its factorization.

201216050109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16428508 (or 16428505 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 201216050109 in words is "two hundred one billion, two hundred sixteen million, fifty thousand, one hundred nine".