211404310021 has 8 divisors (see below), whose sum is σ = 216297002880. Its totient is φ = 206528064288.

The previous prime is 211404309929. The next prime is 211404310057. The reversal of 211404310021 is 120013404112.

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 211404310021 - 2²¹ = 211402212869 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 (211404310321) 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, 4085776 + ... + 4137193.

It is an arithmetic number, because the mean of its divisors is an integer number (27037125360).

Almost surely, 2^211404310021 is an apocalyptic number.

It is an amenable number.

211404310021 is a deficient number, since it is larger than the sum of its proper divisors (4892692859).

211404310021 is an equidigital number, since it uses as much as digits as its factorization.

211404310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223563.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211404310021 its reverse (120013404112), we get a palindrome (331417714133).

The spelling of 211404310021 in words is "two hundred eleven billion, four hundred four million, three hundred ten thousand, twenty-one".