21214144142 has 8 divisors (see below), whose sum is σ = 31857503016. Its totient is φ = 10594976472.

The previous prime is 21214144129. The next prime is 21214144151. The reversal of 21214144142 is 24144141212.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6045608 + ... + 6049115.

It is an arithmetic number, because the mean of its divisors is an integer number (3982187877).

Almost surely, 2^21214144142 is an apocalyptic number.

21214144142 is a deficient number, since it is larger than the sum of its proper divisors (10643358874).

21214144142 is a wasteful number, since it uses less digits than its factorization.

21214144142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095602.

The product of its digits is 2048, while the sum is 26.

Adding to 21214144142 its reverse (24144141212), we get a palindrome (45358285354).

The spelling of 21214144142 in words is "twenty-one billion, two hundred fourteen million, one hundred forty-four thousand, one hundred forty-two".