21110122211 has 8 divisors (see below), whose sum is σ = 21338750064. Its totient is φ = 20881879200.

The previous prime is 21110122183. The next prime is 21110122213. The reversal of 21110122211 is 11222101112.

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 21110122211 - 2²⁶ = 21043013347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110122213) 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, 14780 + ... + 206006.

It is an arithmetic number, because the mean of its divisors is an integer number (2667343758).

Almost surely, 2^21110122211 is an apocalyptic number.

21110122211 is a deficient number, since it is larger than the sum of its proper divisors (228627853).

21110122211 is a wasteful number, since it uses less digits than its factorization.

21110122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192421.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110122211 its reverse (11222101112), we get a palindrome (32332223323).

The spelling of 21110122211 in words is "twenty-one billion, one hundred ten million, one hundred twenty-two thousand, two hundred eleven".