21401013441 has 8 divisors (see below), whose sum is σ = 29198282080. Its totient is φ = 13935543552.

The previous prime is 21401013373. The next prime is 21401013521. The reversal of 21401013441 is 14431010412.

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

It is not a de Polignac number, because 21401013441 - 2¹⁸ = 21400751297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401013241) 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, 82949536 + ... + 82949793.

It is an arithmetic number, because the mean of its divisors is an integer number (3649785260).

Almost surely, 2^21401013441 is an apocalyptic number.

It is an amenable number.

21401013441 is a deficient number, since it is larger than the sum of its proper divisors (7797268639).

21401013441 is a wasteful number, since it uses less digits than its factorization.

21401013441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165899375.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21401013441 its reverse (14431010412), we get a palindrome (35832023853).

The spelling of 21401013441 in words is "twenty-one billion, four hundred one million, thirteen thousand, four hundred forty-one".