21220100211 has 8 divisors (see below), whose sum is σ = 28296910224. Its totient is φ = 14145011840.

The previous prime is 21220100207. The next prime is 21220100227. The reversal of 21220100211 is 11200102212.

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 21220100211 - 2² = 21220100207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220101211) 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, 401370 + ... + 451151.

It is an arithmetic number, because the mean of its divisors is an integer number (3537113778).

Almost surely, 2^21220100211 is an apocalyptic number.

21220100211 is a deficient number, since it is larger than the sum of its proper divisors (7076810013).

21220100211 is an equidigital number, since it uses as much as digits as its factorization.

21220100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860821.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21220100211 its reverse (11200102212), we get a palindrome (32420202423).

The spelling of 21220100211 in words is "twenty-one billion, two hundred twenty million, one hundred thousand, two hundred eleven".