21456331241 has 8 divisors (see below), whose sum is σ = 22487851584. Its totient is φ = 20433030640.

The previous prime is 21456331207. The next prime is 21456331249. The reversal of 21456331241 is 14213365412.

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 21456331241 - 2⁶ = 21456331177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21456331198 and 21456331207.

It is not an unprimeable number, because it can be changed into a prime (21456331249) 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, 2049590 + ... + 2060031.

It is an arithmetic number, because the mean of its divisors is an integer number (2810981448).

Almost surely, 2^21456331241 is an apocalyptic number.

It is an amenable number.

21456331241 is a deficient number, since it is larger than the sum of its proper divisors (1031520343).

21456331241 is a wasteful number, since it uses less digits than its factorization.

21456331241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109871.

The product of its digits is 17280, while the sum is 32.

Adding to 21456331241 its reverse (14213365412), we get a palindrome (35669696653).

The spelling of 21456331241 in words is "twenty-one billion, four hundred fifty-six million, three hundred thirty-one thousand, two hundred forty-one".