21211101102011 has 16 divisors (see below), whose sum is σ = 21851631356544. Its totient is φ = 20577728661504.

The previous prime is 21211101101947. The next prime is 21211101102019. The reversal of 21211101102011 is 11020110111212.

It is a cyclic number.

It is not a de Polignac number, because 21211101102011 - 2⁶ = 21211101101947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211101102019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069016 + ... + 6600378.

It is an arithmetic number, because the mean of its divisors is an integer number (1365726959784).

Almost surely, 2^{21211101102011} is an apocalyptic number.

21211101102011 is a deficient number, since it is larger than the sum of its proper divisors (640530254533).

21211101102011 is a wasteful number, since it uses less digits than its factorization.

21211101102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532010.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21211101102011 its reverse (11020110111212), we get a palindrome (32231211213223).

The spelling of 21211101102011 in words is "twenty-one trillion, two hundred eleven billion, one hundred one million, one hundred two thousand, eleven".