21102144103441 has 16 divisors (see below), whose sum is σ = 22585167403200. Its totient is φ = 19656598449600.

The previous prime is 21102144103429. The next prime is 21102144103459. The reversal of 21102144103441 is 14430144120112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21102144103441 - 2⁵ = 21102144103409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102144103541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144451 + ... + 6498088.

It is an arithmetic number, because the mean of its divisors is an integer number (1411572962700).

Almost surely, 2^{21102144103441} is an apocalyptic number.

It is an amenable number.

21102144103441 is a deficient number, since it is larger than the sum of its proper divisors (1483023299759).

21102144103441 is a wasteful number, since it uses less digits than its factorization.

21102144103441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645360.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21102144103441 its reverse (14430144120112), we get a palindrome (35532288223553).

The spelling of 21102144103441 in words is "twenty-one trillion, one hundred two billion, one hundred forty-four million, one hundred three thousand, four hundred forty-one".