21210201110111 has 8 divisors (see below), whose sum is σ = 22842235345440. Its totient is φ = 19578235489632.

The previous prime is 21210201110107. The next prime is 21210201110167. The reversal of 21210201110111 is 11101110201212.

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 21210201110111 - 2² = 21210201110107 is a prime.

It is a super-2 number, since 2×21210201110111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210201110411) 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, 16510796 + ... + 17748993.

It is an arithmetic number, because the mean of its divisors is an integer number (2855279418180).

Almost surely, 2^{21210201110111} is an apocalyptic number.

21210201110111 is a deficient number, since it is larger than the sum of its proper divisors (1632034235329).

21210201110111 is a wasteful number, since it uses less digits than its factorization.

21210201110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34307425.

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

Adding to 21210201110111 its reverse (11101110201212), we get a palindrome (32311311311323).

The spelling of 21210201110111 in words is "twenty-one trillion, two hundred ten billion, two hundred one million, one hundred ten thousand, one hundred eleven".