21444130101 has 8 divisors (see below), whose sum is σ = 28593606304. Its totient is φ = 14295370320.

The previous prime is 21444130087. The next prime is 21444130129. The reversal of 21444130101 is 10103144412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21444130101 - 2⁹ = 21444129589 is a prime.

It is a super-2 number, since 2×21444130101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444130601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104866 + ... + 232131.

It is an arithmetic number, because the mean of its divisors is an integer number (3574200788).

Almost surely, 2^21444130101 is an apocalyptic number.

It is an amenable number.

21444130101 is a deficient number, since it is larger than the sum of its proper divisors (7149476203).

21444130101 is a wasteful number, since it uses less digits than its factorization.

21444130101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358211.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21444130101 its reverse (10103144412), we get a palindrome (31547274513).

The spelling of 21444130101 in words is "twenty-one billion, four hundred forty-four million, one hundred thirty thousand, one hundred one".