21102101121211 has 8 divisors (see below), whose sum is σ = 23072438908224. Its totient is φ = 19140424160520.

The previous prime is 21102101121139. The next prime is 21102101121253. The reversal of 21102101121211 is 11212110120112.

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 21102101121211 - 2¹¹ = 21102101119163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102101191211) 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, 2165201481 + ... + 2165211226.

It is an arithmetic number, because the mean of its divisors is an integer number (2884054863528).

Almost surely, 2^{21102101121211} is an apocalyptic number.

21102101121211 is a deficient number, since it is larger than the sum of its proper divisors (1970337787013).

21102101121211 is a wasteful number, since it uses less digits than its factorization.

21102101121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330413161.

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

Adding to 21102101121211 its reverse (11212110120112), we get a palindrome (32314211241323).

The spelling of 21102101121211 in words is "twenty-one trillion, one hundred two billion, one hundred one million, one hundred twenty-one thousand, two hundred eleven".