21414421241 has 8 divisors (see below), whose sum is σ = 21528038400. Its totient is φ = 21301105392.

The previous prime is 21414421207. The next prime is 21414421247. The reversal of 21414421241 is 14212441412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414421241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21414421241.

It is not an unprimeable number, because it can be changed into a prime (21414421247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67910 + ... + 217808.

It is an arithmetic number, because the mean of its divisors is an integer number (2691004800).

Almost surely, 2^21414421241 is an apocalyptic number.

It is an amenable number.

21414421241 is a deficient number, since it is larger than the sum of its proper divisors (113617159).

21414421241 is a wasteful number, since it uses less digits than its factorization.

21414421241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150655.

The product of its digits is 2048, while the sum is 26.

Adding to 21414421241 its reverse (14212441412), we get a palindrome (35626862653).

The spelling of 21414421241 in words is "twenty-one billion, four hundred fourteen million, four hundred twenty-one thousand, two hundred forty-one".