21404230211 has 8 divisors (see below), whose sum is σ = 26343668064. Its totient is φ = 16935215040.

The previous prime is 21404230193. The next prime is 21404230213. The reversal of 21404230211 is 11203240412.

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 21404230211 - 2³⁴ = 4224361027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21404230213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117605570 + ... + 117605751.

It is an arithmetic number, because the mean of its divisors is an integer number (3292958508).

Almost surely, 2^21404230211 is an apocalyptic number.

21404230211 is a deficient number, since it is larger than the sum of its proper divisors (4939437853).

21404230211 is a wasteful number, since it uses less digits than its factorization.

21404230211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235211341.

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

Adding to 21404230211 its reverse (11203240412), we get a palindrome (32607470623).

The spelling of 21404230211 in words is "twenty-one billion, four hundred four million, two hundred thirty thousand, two hundred eleven".