209112102 has 12 divisors (see below), whose sum is σ = 453076260. Its totient is φ = 69704028.

The previous prime is 209112091. The next prime is 209112103. The reversal of 209112102 is 201211902.

209112102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11617339 = 209112102 / (2 + 0 + 9 + 1 + 1 + 2 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209112103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5808652 + ... + 5808687.

It is an arithmetic number, because the mean of its divisors is an integer number (37756355).

Almost surely, 2^209112102 is an apocalyptic number.

209112102 is an abundant number, since it is smaller than the sum of its proper divisors (243964158).

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

209112102 is a wasteful number, since it uses less digits than its factorization.

209112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11617347 (or 11617344 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 209112102 is about 14460.7089037848. The cubic root of 209112102 is about 593.5532981369.

The spelling of 209112102 in words is "two hundred nine million, one hundred twelve thousand, one hundred two".