21414441111 has 32 divisors (see below), whose sum is σ = 34627461120. Its totient is φ = 11506386144.

The previous prime is 21414441089. The next prime is 21414441121. The reversal of 21414441111 is 11114441412.

It is not a de Polignac number, because 21414441111 - 2²¹ = 21412343959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414441121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347235 + ... + 404228.

It is an arithmetic number, because the mean of its divisors is an integer number (1082108160).

Almost surely, 2^21414441111 is an apocalyptic number.

21414441111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21414441111 is a deficient number, since it is larger than the sum of its proper divisors (13213020009).

21414441111 is a wasteful number, since it uses less digits than its factorization.

21414441111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751555.

The product of its digits is 512, while the sum is 24.

Adding to 21414441111 its reverse (11114441412), we get a palindrome (32528882523).

It can be divided in two parts, 214144 and 41111, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 21414441111 in words is "twenty-one billion, four hundred fourteen million, four hundred forty-one thousand, one hundred eleven".