21441040121 has 8 divisors (see below), whose sum is σ = 22256206464. Its totient is φ = 20640831120.

The previous prime is 21441040111. The next prime is 21441040141. The reversal of 21441040121 is 12104014412.

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 21441040121 - 2⁶ = 21441040057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21441040093 and 21441040102.

It is not an unprimeable number, because it can be changed into a prime (21441040111) 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, 3736415 + ... + 3742148.

It is an arithmetic number, because the mean of its divisors is an integer number (2782025808).

Almost surely, 2^21441040121 is an apocalyptic number.

It is an amenable number.

21441040121 is a deficient number, since it is larger than the sum of its proper divisors (815166343).

21441040121 is an equidigital number, since it uses as much as digits as its factorization.

21441040121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478671.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21441040121 its reverse (12104014412), we get a palindrome (33545054533).

The spelling of 21441040121 in words is "twenty-one billion, four hundred forty-one million, forty thousand, one hundred twenty-one".