21001000210201 has 8 divisors (see below), whose sum is σ = 22926102969600. Its totient is φ = 19078550937840.

The previous prime is 21001000210187. The next prime is 21001000210207. The reversal of 21001000210201 is 10201200010012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001000210201 - 2²¹ = 21000998113049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001000210207) 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, 663355206 + ... + 663386863.

It is an arithmetic number, because the mean of its divisors is an integer number (2865762871200).

Almost surely, 2^{21001000210201} is an apocalyptic number.

It is an amenable number.

21001000210201 is a deficient number, since it is larger than the sum of its proper divisors (1925102759399).

21001000210201 is a wasteful number, since it uses less digits than its factorization.

21001000210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326743519.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21001000210201 its reverse (10201200010012), we get a palindrome (31202200220213).

The spelling of 21001000210201 in words is "twenty-one trillion, one billion, two hundred ten thousand, two hundred one".