21441430311 has 8 divisors (see below), whose sum is σ = 32672655744. Its totient is φ = 12252245880.

The previous prime is 21441430303. The next prime is 21441430331. The reversal of 21441430311 is 11303414412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21441430311 - 2³ = 21441430303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441430331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510510225 + ... + 510510266.

It is an arithmetic number, because the mean of its divisors is an integer number (4084081968).

Almost surely, 2^21441430311 is an apocalyptic number.

21441430311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21441430311 is a deficient number, since it is larger than the sum of its proper divisors (11231225433).

21441430311 is a wasteful number, since it uses less digits than its factorization.

21441430311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021020501.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21441430311 its reverse (11303414412), we get a palindrome (32744844723).

The spelling of 21441430311 in words is "twenty-one billion, four hundred forty-one million, four hundred thirty thousand, three hundred eleven".