211100021120021 has 8 divisors (see below), whose sum is σ = 240303581354304. Its totient is φ = 183565235756320.

The previous prime is 211100021119937. The next prime is 211100021120033. The reversal of 211100021120021 is 120021120001112.

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

It is not a de Polignac number, because 211100021120021 - 2³⁰ = 211098947378197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100021119978 and 211100021120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100021120921) 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 7 ways as a sum of consecutive naturals, for example, 417193717376 + ... + 417193717881.

It is an arithmetic number, because the mean of its divisors is an integer number (30037947669288).

Almost surely, 2^{211100021120021} is an apocalyptic number.

It is an amenable number.

211100021120021 is a deficient number, since it is larger than the sum of its proper divisors (29203560234283).

211100021120021 is a wasteful number, since it uses less digits than its factorization.

211100021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834387435291.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211100021120021 its reverse (120021120001112), we get a palindrome (331121141121133).

The spelling of 211100021120021 in words is "two hundred eleven trillion, one hundred billion, twenty-one million, one hundred twenty thousand, twenty-one".