21241540405101 has 4 divisors (see below), whose sum is σ = 28322053873472. Its totient is φ = 14161026936732.

The previous prime is 21241540405091. The next prime is 21241540405103. The reversal of 21241540405101 is 10150404514212.

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 not a de Polignac number, because 21241540405101 - 2²⁶ = 21241473296237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241540405103) 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, 3540256734181 + ... + 3540256734186.

It is an arithmetic number, because the mean of its divisors is an integer number (7080513468368).

Almost surely, 2^{21241540405101} is an apocalyptic number.

It is an amenable number.

21241540405101 is a deficient number, since it is larger than the sum of its proper divisors (7080513468371).

21241540405101 is an equidigital number, since it uses as much as digits as its factorization.

21241540405101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7080513468370.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 21241540405101 its reverse (10150404514212), we get a palindrome (31391944919313).

The spelling of 21241540405101 in words is "twenty-one trillion, two hundred forty-one billion, five hundred forty million, four hundred five thousand, one hundred one".