21044143102 has 8 divisors (see below), whose sum is σ = 31673950056. Its totient is φ = 10486159752.

The previous prime is 21044143091. The next prime is 21044143117. The reversal of 21044143102 is 20134144012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17955168 + ... + 17956339.

It is an arithmetic number, because the mean of its divisors is an integer number (3959243757).

Almost surely, 2^21044143102 is an apocalyptic number.

21044143102 is a deficient number, since it is larger than the sum of its proper divisors (10629806954).

21044143102 is a wasteful number, since it uses less digits than its factorization.

21044143102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35911802.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21044143102 its reverse (20134144012), we get a palindrome (41178287114).

The spelling of 21044143102 in words is "twenty-one billion, forty-four million, one hundred forty-three thousand, one hundred two".