206021001 has 8 divisors (see below), whose sum is σ = 274991584. Its totient is φ = 137198880.

The previous prime is 206020993. The next prime is 206021021. The reversal of 206021001 is 100120602.

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

It is not a de Polignac number, because 206021001 - 2³ = 206020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206021021) 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, 33835 + ... + 39456.

It is an arithmetic number, because the mean of its divisors is an integer number (34373948).

Almost surely, 2^206021001 is an apocalyptic number.

It is an amenable number.

206021001 is a deficient number, since it is larger than the sum of its proper divisors (68970583).

206021001 is an equidigital number, since it uses as much as digits as its factorization.

206021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74231.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 206021001 is about 14353.4316802638. The cubic root of 206021001 is about 590.6141273663.

Adding to 206021001 its reverse (100120602), we get a palindrome (306141603).

It can be divided in two parts, 20602 and 1001, that multiplied together give a palindrome (20622602).

The spelling of 206021001 in words is "two hundred six million, twenty-one thousand, one".