211102021001 has 4 divisors (see below), whose sum is σ = 213038736900. Its totient is φ = 209165305104.

The previous prime is 211102020989. The next prime is 211102021033. The reversal of 211102021001 is 100120201112.

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 80021094400 + 131080926601 = 282880^2 + 362051^2 .

It is a cyclic number.

It is not a de Polignac number, because 211102021001 - 2²² = 211097826697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211102021051) 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, 968357786 + ... + 968358003.

It is an arithmetic number, because the mean of its divisors is an integer number (53259684225).

Almost surely, 2^211102021001 is an apocalyptic number.

It is an amenable number.

211102021001 is a deficient number, since it is larger than the sum of its proper divisors (1936715899).

211102021001 is a wasteful number, since it uses less digits than its factorization.

211102021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936715898.

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

Adding to 211102021001 its reverse (100120201112), we get a palindrome (311222222113).

The spelling of 211102021001 in words is "two hundred eleven billion, one hundred two million, twenty-one thousand, one".