206850942112721 has 2 divisors, whose sum is σ = 206850942112722. Its totient is φ = 206850942112720.

The previous prime is 206850942112699. The next prime is 206850942112933. The reversal of 206850942112721 is 127211249058602.

206850942112721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105490647306496 + 101360294806225 = 10270864^2 + 10067785^2 .

It is a cyclic number.

It is not a de Polignac number, because 206850942112721 - 2⁴² = 202452895601617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206850942112721.

It is not a weakly prime, because it can be changed into another prime (206850962112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103425471056360 + 103425471056361.

It is an arithmetic number, because the mean of its divisors is an integer number (103425471056361).

Almost surely, 2^{206850942112721} is an apocalyptic number.

It is an amenable number.

206850942112721 is a deficient number, since it is larger than the sum of its proper divisors (1).

206850942112721 is an equidigital number, since it uses as much as digits as its factorization.

206850942112721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 206850942112721 in words is "two hundred six trillion, eight hundred fifty billion, nine hundred forty-two million, one hundred twelve thousand, seven hundred twenty-one".