21443541110101 has 4 divisors (see below), whose sum is σ = 23392953938304. Its totient is φ = 19494128281900.

The previous prime is 21443541110083. The next prime is 21443541110171. The reversal of 21443541110101 is 10101114534412.

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 21443541110101 - 2²⁵ = 21443507555669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443541110101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443541110171) 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, 974706414085 + ... + 974706414106.

It is an arithmetic number, because the mean of its divisors is an integer number (5848238484576).

Almost surely, 2^{21443541110101} is an apocalyptic number.

It is an amenable number.

21443541110101 is a deficient number, since it is larger than the sum of its proper divisors (1949412828203).

21443541110101 is a wasteful number, since it uses less digits than its factorization.

21443541110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949412828202.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 21443541110101 its reverse (10101114534412), we get a palindrome (31544655644513).

The spelling of 21443541110101 in words is "twenty-one trillion, four hundred forty-three billion, five hundred forty-one million, one hundred ten thousand, one hundred one".