21022100001211 has 8 divisors (see below), whose sum is σ = 21536934922944. Its totient is φ = 20507365116480.

The previous prime is 21022100001191. The next prime is 21022100001239. The reversal of 21022100001211 is 11210000122012.

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 21022100001211 - 2¹¹ = 21022099999163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022100001191 and 21022100001200.

It is not an unprimeable number, because it can be changed into a prime (21022100001811) 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, 24583731 + ... + 25424476.

It is an arithmetic number, because the mean of its divisors is an integer number (2692116865368).

Almost surely, 2^{21022100001211} is an apocalyptic number.

21022100001211 is a deficient number, since it is larger than the sum of its proper divisors (514834921733).

21022100001211 is a wasteful number, since it uses less digits than its factorization.

21022100001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50018501.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022100001211 its reverse (11210000122012), we get a palindrome (32232100123223).

The spelling of 21022100001211 in words is "twenty-one trillion, twenty-two billion, one hundred million, one thousand, two hundred eleven".