21041440211 has 32 divisors (see below), whose sum is σ = 23557602816. Its totient is φ = 18633888000.

The previous prime is 21041440169. The next prime is 21041440213. The reversal of 21041440211 is 11204414012.

It is a cyclic number.

It is not a de Polignac number, because 21041440211 - 2¹⁰ = 21041439187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21041440213) 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, 33345866 + ... + 33346496.

It is an arithmetic number, because the mean of its divisors is an integer number (736175088).

Almost surely, 2^21041440211 is an apocalyptic number.

21041440211 is a deficient number, since it is larger than the sum of its proper divisors (2516162605).

21041440211 is a wasteful number, since it uses less digits than its factorization.

21041440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21041440211 its reverse (11204414012), we get a palindrome (32245854223).

The spelling of 21041440211 in words is "twenty-one billion, forty-one million, four hundred forty thousand, two hundred eleven".