21101201112011 has 8 divisors (see below), whose sum is σ = 21192713931984. Its totient is φ = 21009798617760.

The previous prime is 21101201112001. The next prime is 21101201112023. The reversal of 21101201112011 is 11021110210112.

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 21101201112011 - 2¹⁰ = 21101201110987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101201112001) 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, 27198065 + ... + 27963138.

It is an arithmetic number, because the mean of its divisors is an integer number (2649089241498).

Almost surely, 2^{21101201112011} is an apocalyptic number.

21101201112011 is a deficient number, since it is larger than the sum of its proper divisors (91512819973).

21101201112011 is a wasteful number, since it uses less digits than its factorization.

21101201112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55162861.

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

Adding to 21101201112011 its reverse (11021110210112), we get a palindrome (32122311322123).

The spelling of 21101201112011 in words is "twenty-one trillion, one hundred one billion, two hundred one million, one hundred twelve thousand, eleven".