201200021001001 has 4 divisors (see below), whose sum is σ = 219490932001104. Its totient is φ = 182909110000900.

The previous prime is 201200021000999. The next prime is 201200021001011. The reversal of 201200021001001 is 100100120002102.

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 cyclic number.

It is not a de Polignac number, because 201200021001001 - 2¹ = 201200021000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201200021001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9145455500035 + ... + 9145455500056.

It is an arithmetic number, because the mean of its divisors is an integer number (54872733000276).

Almost surely, 2^{201200021001001} is an apocalyptic number.

It is an amenable number.

201200021001001 is a deficient number, since it is larger than the sum of its proper divisors (18290911000103).

201200021001001 is a wasteful number, since it uses less digits than its factorization.

201200021001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18290911000102.

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

Adding to 201200021001001 its reverse (100100120002102), we get a palindrome (301300141003103).

The spelling of 201200021001001 in words is "two hundred one trillion, two hundred billion, twenty-one million, one thousand, one".