206245758121 has 16 divisors (see below), whose sum is σ = 225549273600. Its totient is φ = 187446886848.

The previous prime is 206245758067. The next prime is 206245758127. The reversal of 206245758121 is 121857542602.

It is a de Polignac number, because none of the positive numbers 2^k-206245758121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206245758127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88995 + ... + 648391.

It is an arithmetic number, because the mean of its divisors is an integer number (14096829600).

Almost surely, 2^206245758121 is an apocalyptic number.

It is an amenable number.

206245758121 is a deficient number, since it is larger than the sum of its proper divisors (19303515479).

206245758121 is a wasteful number, since it uses less digits than its factorization.

206245758121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559848.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 206245758121 in words is "two hundred six billion, two hundred forty-five million, seven hundred fifty-eight thousand, one hundred twenty-one".