21152346512441 has 4 divisors (see below), whose sum is σ = 21162272533584. Its totient is φ = 21142420491300.

The previous prime is 21152346512399. The next prime is 21152346512503. The reversal of 21152346512441 is 14421564325112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21152346512441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152396512441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4963007375 + ... + 4963011636.

It is an arithmetic number, because the mean of its divisors is an integer number (5290568133396).

Almost surely, 2^{21152346512441} is an apocalyptic number.

It is an amenable number.

21152346512441 is a deficient number, since it is larger than the sum of its proper divisors (9926021143).

21152346512441 is an equidigital number, since it uses as much as digits as its factorization.

21152346512441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9926021142.

The product of its digits is 230400, while the sum is 41.

The spelling of 21152346512441 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred forty-six million, five hundred twelve thousand, four hundred forty-one".