206121456342105 has 8 divisors (see below), whose sum is σ = 329794330147392. Its totient is φ = 109931443382448.

The previous prime is 206121456342101. The next prime is 206121456342209. The reversal of 206121456342105 is 501243654121602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206121456342105 - 2² = 206121456342101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206121456342101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6870715211389 + ... + 6870715211418.

It is an arithmetic number, because the mean of its divisors is an integer number (41224291268424).

Almost surely, 2^{206121456342105} is an apocalyptic number.

It is an amenable number.

206121456342105 is a deficient number, since it is larger than the sum of its proper divisors (123672873805287).

206121456342105 is a wasteful number, since it uses less digits than its factorization.

206121456342105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13741430422815.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 206121456342105 in words is "two hundred six trillion, one hundred twenty-one billion, four hundred fifty-six million, three hundred forty-two thousand, one hundred five".