21241453432441 has 6 divisors (see below), whose sum is σ = 23348043855626. Its totient is φ = 19310412211200.

The previous prime is 21241453432399. The next prime is 21241453432457. The reversal of 21241453432441 is 14423435414212.

It can be written as a sum of positive squares in only one way, i.e., 16993851969600 + 4247601462841 = 4122360^2 + 2060971^2 .

It is not a de Polignac number, because 21241453432441 - 2⁴³ = 12445360410233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21241453432394 and 21241453432403.

It is not an unprimeable number, because it can be changed into a prime (21241453432141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87774600840 + ... + 87774601081.

Almost surely, 2^{21241453432441} is an apocalyptic number.

It is an amenable number.

21241453432441 is a deficient number, since it is larger than the sum of its proper divisors (2106590423185).

21241453432441 is a wasteful number, since it uses less digits than its factorization.

21241453432441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175549201943 (or 175549201932 counting only the distinct ones).

The product of its digits is 368640, while the sum is 40.

Adding to 21241453432441 its reverse (14423435414212), we get a palindrome (35664888846653).

The spelling of 21241453432441 in words is "twenty-one trillion, two hundred forty-one billion, four hundred fifty-three million, four hundred thirty-two thousand, four hundred forty-one".