21221200100211 has 8 divisors (see below), whose sum is σ = 28295029554624. Its totient is φ = 14147418689640.

The previous prime is 21221200100201. The next prime is 21221200100237. The reversal of 21221200100211 is 11200100212212.

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

It is not a de Polignac number, because 21221200100211 - 2⁵ = 21221200100179 is a prime.

It is a super-3 number, since 3×21221200100211³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21221200100201) 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, 10967361 + ... + 12756386.

It is an arithmetic number, because the mean of its divisors is an integer number (3536878694328).

Almost surely, 2^{21221200100211} is an apocalyptic number.

21221200100211 is a deficient number, since it is larger than the sum of its proper divisors (7073829454413).

21221200100211 is a wasteful number, since it uses less digits than its factorization.

21221200100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24021921.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21221200100211 its reverse (11200100212212), we get a palindrome (32421300312423).

The spelling of 21221200100211 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred million, one hundred thousand, two hundred eleven".