21242342420441 has 4 divisors (see below), whose sum is σ = 21242440218384. Its totient is φ = 21242244622500.

The previous prime is 21242342420423. The next prime is 21242342420447. The reversal of 21242342420441 is 14402424324212.

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 not a de Polignac number, because 21242342420441 - 2³⁸ = 20967464513497 is a prime.

It is a super-2 number, since 2×21242342420441² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21242342420447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48572435 + ... + 49007816.

It is an arithmetic number, because the mean of its divisors is an integer number (5310610054596).

Almost surely, 2^{21242342420441} is an apocalyptic number.

It is an amenable number.

21242342420441 is a deficient number, since it is larger than the sum of its proper divisors (97797943).

21242342420441 is an equidigital number, since it uses as much as digits as its factorization.

21242342420441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97797942.

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 21242342420441 its reverse (14402424324212), we get a palindrome (35644766744653).

The spelling of 21242342420441 in words is "twenty-one trillion, two hundred forty-two billion, three hundred forty-two million, four hundred twenty thousand, four hundred forty-one".