211404203021 has 16 divisors (see below), whose sum is σ = 233025120000. Its totient is φ = 190185624000.

The previous prime is 211404202979. The next prime is 211404203041. The reversal of 211404203021 is 120302404112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211404203021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211404202984 and 211404203002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211404203041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2173295 + ... + 2268483.

It is an arithmetic number, because the mean of its divisors is an integer number (14564070000).

Almost surely, 2^211404203021 is an apocalyptic number.

It is an amenable number.

211404203021 is a deficient number, since it is larger than the sum of its proper divisors (21620916979).

211404203021 is a wasteful number, since it uses less digits than its factorization.

211404203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97300.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211404203021 its reverse (120302404112), we get a palindrome (331706607133).

The spelling of 211404203021 in words is "two hundred eleven billion, four hundred four million, two hundred three thousand, twenty-one".