21424341241 has 4 divisors (see below), whose sum is σ = 21454904484. Its totient is φ = 21393778000.

The previous prime is 21424341221. The next prime is 21424341283. The reversal of 21424341241 is 14214342412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17954660025 + 3469681216 = 133995^2 + 58904^2 .

It is a cyclic number.

It is not a de Polignac number, because 21424341241 - 2¹⁵ = 21424308473 is a prime.

It is a super-2 number, since 2×21424341241² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424341221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15280570 + ... + 15281971.

It is an arithmetic number, because the mean of its divisors is an integer number (5363726121).

Almost surely, 2^21424341241 is an apocalyptic number.

It is an amenable number.

21424341241 is a deficient number, since it is larger than the sum of its proper divisors (30563243).

21424341241 is an equidigital number, since it uses as much as digits as its factorization.

21424341241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30563242.

The product of its digits is 6144, while the sum is 28.

Adding to 21424341241 its reverse (14214342412), we get a palindrome (35638683653).

The spelling of 21424341241 in words is "twenty-one billion, four hundred twenty-four million, three hundred forty-one thousand, two hundred forty-one".