21110233441 has 16 divisors (see below), whose sum is σ = 23543635968. Its totient is φ = 18763390800.

The previous prime is 21110233439. The next prime is 21110233457. The reversal of 21110233441 is 14433201112.

It is not a de Polignac number, because 21110233441 - 2¹ = 21110233439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110233471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491746 + ... + 532948.

It is an arithmetic number, because the mean of its divisors is an integer number (1471477248).

Almost surely, 2^21110233441 is an apocalyptic number.

It is an amenable number.

21110233441 is a deficient number, since it is larger than the sum of its proper divisors (2433402527).

21110233441 is a wasteful number, since it uses less digits than its factorization.

21110233441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42252.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21110233441 its reverse (14433201112), we get a palindrome (35543434553).

The spelling of 21110233441 in words is "twenty-one billion, one hundred ten million, two hundred thirty-three thousand, four hundred forty-one".