206120136242 has 16 divisors (see below), whose sum is σ = 324943859520. Its totient is φ = 97869989712.

The previous prime is 206120136217. The next prime is 206120136251. The reversal of 206120136242 is 242631021602.

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, 16111853 + ... + 16124640.

It is an arithmetic number, because the mean of its divisors is an integer number (20308991220).

Almost surely, 2^206120136242 is an apocalyptic number.

206120136242 is a deficient number, since it is larger than the sum of its proper divisors (118823723278).

206120136242 is a wasteful number, since it uses less digits than its factorization.

206120136242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32236657.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 206120136242 its reverse (242631021602), we get a palindrome (448751157844).

The spelling of 206120136242 in words is "two hundred six billion, one hundred twenty million, one hundred thirty-six thousand, two hundred forty-two".