21144100023441 has 16 divisors (see below), whose sum is σ = 31396935814720. Its totient is φ = 14063512248000.

The previous prime is 21144100023419. The next prime is 21144100023451. The reversal of 21144100023441 is 14432000144112.

21144100023441 is a `hidden beast` number, since 2 + 1 + 14 + 410 + 0 + 0 + 234 + 4 + 1 = 666.

It is not a de Polignac number, because 21144100023441 - 2⁴¹ = 18945076767889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21144100023451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904277935 + ... + 904301316.

It is an arithmetic number, because the mean of its divisors is an integer number (1962308488420).

Almost surely, 2^{21144100023441} is an apocalyptic number.

It is an amenable number.

21144100023441 is a deficient number, since it is larger than the sum of its proper divisors (10252835791279).

21144100023441 is a wasteful number, since it uses less digits than its factorization.

21144100023441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808579693 (or 1808579687 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21144100023441 its reverse (14432000144112), we get a palindrome (35576100167553).

The spelling of 21144100023441 in words is "twenty-one trillion, one hundred forty-four billion, one hundred million, twenty-three thousand, four hundred forty-one".