21233041441 has 4 divisors (see below), whose sum is σ = 21236180400. Its totient is φ = 21229902484.

The previous prime is 21233041393. The next prime is 21233041457. The reversal of 21233041441 is 14414033212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21233041441 - 2²¹ = 21230944289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233041471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559311 + ... + 1572868.

It is an arithmetic number, because the mean of its divisors is an integer number (5309045100).

Almost surely, 2^21233041441 is an apocalyptic number.

It is an amenable number.

21233041441 is a deficient number, since it is larger than the sum of its proper divisors (3138959).

21233041441 is an equidigital number, since it uses as much as digits as its factorization.

21233041441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138958.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21233041441 its reverse (14414033212), we get a palindrome (35647074653).

The spelling of 21233041441 in words is "twenty-one billion, two hundred thirty-three million, forty-one thousand, four hundred forty-one".