21211311441 has 8 divisors (see below), whose sum is σ = 28282444384. Its totient is φ = 14140526400.

The previous prime is 21211311403. The next prime is 21211311461. The reversal of 21211311441 is 14411311212.

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

It is not a de Polignac number, because 21211311441 - 2¹⁴ = 21211295057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21211311461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139641 + ... + 248841.

It is an arithmetic number, because the mean of its divisors is an integer number (3535305548).

Almost surely, 2^21211311441 is an apocalyptic number.

It is an amenable number.

21211311441 is a deficient number, since it is larger than the sum of its proper divisors (7071132943).

21211311441 is a wasteful number, since it uses less digits than its factorization.

21211311441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173951.

The product of its digits is 192, while the sum is 21.

Adding to 21211311441 its reverse (14411311212), we get a palindrome (35622622653).

The spelling of 21211311441 in words is "twenty-one billion, two hundred eleven million, three hundred eleven thousand, four hundred forty-one".