206099912971 has 4 divisors (see below), whose sum is σ = 206101046200. Its totient is φ = 206098779744.

The previous prime is 206099912911. The next prime is 206099912983. The reversal of 206099912971 is 179219990602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206099912971 - 2³¹ = 203952429323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206099912911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225261 + ... + 680398.

It is an arithmetic number, because the mean of its divisors is an integer number (51525261550).

Almost surely, 2^206099912971 is an apocalyptic number.

206099912971 is a deficient number, since it is larger than the sum of its proper divisors (1133229).

206099912971 is an equidigital number, since it uses as much as digits as its factorization.

206099912971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133228.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 206099912971 in words is "two hundred six billion, ninety-nine million, nine hundred twelve thousand, nine hundred seventy-one".