211021221120001 has 4 divisors (see below), whose sum is σ = 211218621702100. Its totient is φ = 210823820537904.

The previous prime is 211021221119977. The next prime is 211021221120049. The reversal of 211021221120001 is 100021122120112.

211021221120001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 115859713354225 + 95161507765776 = 10763815^2 + 9755076^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021221120001 - 2³¹ = 211019073636353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021221120701) 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, 98700289446 + ... + 98700291583.

It is an arithmetic number, because the mean of its divisors is an integer number (52804655425525).

Almost surely, 2^{211021221120001} is an apocalyptic number.

It is an amenable number.

211021221120001 is a deficient number, since it is larger than the sum of its proper divisors (197400582099).

211021221120001 is a wasteful number, since it uses less digits than its factorization.

211021221120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197400582098.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211021221120001 its reverse (100021122120112), we get a palindrome (311042343240113).

The spelling of 211021221120001 in words is "two hundred eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one".