21240140411 has 8 divisors (see below), whose sum is σ = 24280829664. Its totient is φ = 18201047040.

The previous prime is 21240140401. The next prime is 21240140417. The reversal of 21240140411 is 11404104212.

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

It is a cyclic number.

It is not a de Polignac number, because 21240140411 - 2⁶ = 21240140347 is a prime.

It is a super-2 number, since 2×21240140411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21240140417) 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, 370310 + ... + 423803.

It is an arithmetic number, because the mean of its divisors is an integer number (3035103708).

Almost surely, 2^21240140411 is an apocalyptic number.

21240140411 is a deficient number, since it is larger than the sum of its proper divisors (3040689253).

21240140411 is an equidigital number, since it uses as much as digits as its factorization.

21240140411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797941.

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

Adding to 21240140411 its reverse (11404104212), we get a palindrome (32644244623).

The spelling of 21240140411 in words is "twenty-one billion, two hundred forty million, one hundred forty thousand, four hundred eleven".