21221300211 has 8 divisors (see below), whose sum is σ = 28298415504. Its totient is φ = 14145859200.

The previous prime is 21221300207. The next prime is 21221300231. The reversal of 21221300211 is 11200312212.

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

It is not a de Polignac number, because 21221300211 - 2² = 21221300207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221300231) 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, 388690 + ... + 439911.

It is an arithmetic number, because the mean of its divisors is an integer number (3537301938).

Almost surely, 2^21221300211 is an apocalyptic number.

21221300211 is a deficient number, since it is larger than the sum of its proper divisors (7077115293).

21221300211 is an equidigital number, since it uses as much as digits as its factorization.

21221300211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837141.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21221300211 its reverse (11200312212), we get a palindrome (32421612423).

The spelling of 21221300211 in words is "twenty-one billion, two hundred twenty-one million, three hundred thousand, two hundred eleven".