211120202200021 has 8 divisors (see below), whose sum is σ = 211367962060344. Its totient is φ = 210872566879680.

The previous prime is 211120202199967. The next prime is 211120202200049. The reversal of 211120202200021 is 120002202021112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46565542971025 + 164554659228996 = 6823895^2 + 12827886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211120202200021 - 2¹⁷ = 211120202068949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120202199968 and 211120202200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120202200121) 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 7 ways as a sum of consecutive naturals, for example, 27742390 + ... + 34523623.

It is an arithmetic number, because the mean of its divisors is an integer number (26420995257543).

Almost surely, 2^{211120202200021} is an apocalyptic number.

It is an amenable number.

211120202200021 is a deficient number, since it is larger than the sum of its proper divisors (247759860323).

211120202200021 is a wasteful number, since it uses less digits than its factorization.

211120202200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62269991.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211120202200021 its reverse (120002202021112), we get a palindrome (331122404221133).

The spelling of 211120202200021 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred two million, two hundred thousand, twenty-one".