21100211210111 has 8 divisors (see below), whose sum is σ = 23194125301248. Its totient is φ = 19035582631000.

The previous prime is 21100211210093. The next prime is 21100211210119. The reversal of 21100211210111 is 11101211200112.

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 21100211210111 - 2¹⁰ = 21100211209087 is a prime.

It is a super-2 number, since 2×21100211210111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100211210119) 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, 7321376495 + ... + 7321379376.

It is an arithmetic number, because the mean of its divisors is an integer number (2899265662656).

Almost surely, 2^{21100211210111} is an apocalyptic number.

21100211210111 is a deficient number, since it is larger than the sum of its proper divisors (2093914091137).

21100211210111 is a wasteful number, since it uses less digits than its factorization.

21100211210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14642756013.

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

Adding to 21100211210111 its reverse (11101211200112), we get a palindrome (32201422410223).

Subtracting from 21100211210111 its reverse (11101211200112), we obtain a palindrome (9999000009999).

The spelling of 21100211210111 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred ten thousand, one hundred eleven".