211021002001 has 4 divisors (see below), whose sum is σ = 211842095652. Its totient is φ = 210199908352.

The previous prime is 211021001969. The next prime is 211021002037. The reversal of 211021002001 is 100200120112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140682005776 + 70338996225 = 375076^2 + 265215^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021002001 - 2⁵ = 211021001969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021002041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410546440 + ... + 410546953.

It is an arithmetic number, because the mean of its divisors is an integer number (52960523913).

Almost surely, 2^211021002001 is an apocalyptic number.

It is an amenable number.

211021002001 is a deficient number, since it is larger than the sum of its proper divisors (821093651).

211021002001 is an equidigital number, since it uses as much as digits as its factorization.

211021002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821093650.

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

Adding to 211021002001 its reverse (100200120112), we get a palindrome (311221122113).

The spelling of 211021002001 in words is "two hundred eleven billion, twenty-one million, two thousand, one".