21230003211 has 8 divisors (see below), whose sum is σ = 28307449344. Its totient is φ = 14152946280.

The previous prime is 21230003177. The next prime is 21230003239. The reversal of 21230003211 is 11230003212.

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

It is not a de Polignac number, because 21230003211 - 2⁶ = 21230003147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230003411) 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, 72126 + ... + 218316.

It is an arithmetic number, because the mean of its divisors is an integer number (3538431168).

Almost surely, 2^21230003211 is an apocalyptic number.

21230003211 is a deficient number, since it is larger than the sum of its proper divisors (7077446133).

21230003211 is a wasteful number, since it uses less digits than its factorization.

21230003211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194601.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21230003211 its reverse (11230003212), we get a palindrome (32460006423).

Subtracting from 21230003211 its reverse (11230003212), we obtain a palindrome (9999999999).

The spelling of 21230003211 in words is "twenty-one billion, two hundred thirty million, three thousand, two hundred eleven".