201020100021001 has 8 divisors (see below), whose sum is σ = 204448302433440. Its totient is φ = 197592600344448.

The previous prime is 201020100020989. The next prime is 201020100021011. The reversal of 201020100021001 is 100120001020102.

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 201020100021001 - 2⁹ = 201020100020489 is a prime.

It is a super-2 number, since 2×201020100021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020100021011) 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, 175106971 + ... + 176251216.

It is an arithmetic number, because the mean of its divisors is an integer number (25556037804180).

Almost surely, 2^{201020100021001} is an apocalyptic number.

It is an amenable number.

201020100021001 is a deficient number, since it is larger than the sum of its proper divisors (3428202412439).

201020100021001 is an equidigital number, since it uses as much as digits as its factorization.

201020100021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351367943.

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

Adding to 201020100021001 its reverse (100120001020102), we get a palindrome (301140101041103).

The spelling of 201020100021001 in words is "two hundred one trillion, twenty billion, one hundred million, twenty-one thousand, one".