211323040021 has 8 divisors (see below), whose sum is σ = 212684569344. Its totient is φ = 209965396320.

The previous prime is 211323040007. The next prime is 211323040067. The reversal of 211323040021 is 120040323112.

It is a happy number.

211323040021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211323040021 - 2¹⁵ = 211323007253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211323040321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862245 + ... + 1079866.

It is an arithmetic number, because the mean of its divisors is an integer number (26585571168).

Almost surely, 2^211323040021 is an apocalyptic number.

It is an amenable number.

211323040021 is a deficient number, since it is larger than the sum of its proper divisors (1361529323).

211323040021 is a wasteful number, since it uses less digits than its factorization.

211323040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942811.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 211323040021 its reverse (120040323112), we get a palindrome (331363363133).

The spelling of 211323040021 in words is "two hundred eleven billion, three hundred twenty-three million, forty thousand, twenty-one".