21110121012211 has 64 divisors (see below), whose sum is σ = 27700919009280. Its totient is φ = 15598375752960.

The previous prime is 21110121012191. The next prime is 21110121012241. The reversal of 21110121012211 is 11221012101112.

It is not a de Polignac number, because 21110121012211 - 2⁷ = 21110121012083 is a prime.

It is a super-2 number, since 2×21110121012211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110121012241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298429495 + ... + 298500223.

It is an arithmetic number, because the mean of its divisors is an integer number (432826859520).

Almost surely, 2^{21110121012211} is an apocalyptic number.

21110121012211 is a deficient number, since it is larger than the sum of its proper divisors (6590797997069).

21110121012211 is a wasteful number, since it uses less digits than its factorization.

21110121012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72224.

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

Adding to 21110121012211 its reverse (11221012101112), we get a palindrome (32331133113323).

The spelling of 21110121012211 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, twelve thousand, two hundred eleven".