201002101021001 has 4 divisors (see below), whose sum is σ = 229716686881152. Its totient is φ = 172287515160852.

The previous prime is 201002101020979. The next prime is 201002101021027. The reversal of 201002101021001 is 100120101200102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-201002101021001 is a prime.

It is a super-2 number, since 2×201002101021001² (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 (201002101021061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14357292930065 + ... + 14357292930078.

It is an arithmetic number, because the mean of its divisors is an integer number (57429171720288).

Almost surely, 2^{201002101021001} is an apocalyptic number.

It is an amenable number.

201002101021001 is a deficient number, since it is larger than the sum of its proper divisors (28714585860151).

201002101021001 is an equidigital number, since it uses as much as digits as its factorization.

201002101021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28714585860150.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201002101021001 its reverse (100120101200102), we get a palindrome (301122202221103).

The spelling of 201002101021001 in words is "two hundred one trillion, two billion, one hundred one million, twenty-one thousand, one".