21142214444 has 12 divisors (see below), whose sum is σ = 39844942704. Its totient is φ = 9757945104.

The previous prime is 21142214411. The next prime is 21142214461. The reversal of 21142214444 is 44441224112.

It is a nude number because it is divisible by every one of its digits.

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, 203290472 + ... + 203290575.

It is an arithmetic number, because the mean of its divisors is an integer number (3320411892).

Almost surely, 2^21142214444 is an apocalyptic number.

It is an amenable number.

21142214444 is a deficient number, since it is larger than the sum of its proper divisors (18702728260).

21142214444 is a wasteful number, since it uses less digits than its factorization.

21142214444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406581064 (or 406581062 counting only the distinct ones).

The product of its digits is 8192, while the sum is 29.

Adding to 21142214444 its reverse (44441224112), we get a palindrome (65583438556).

The spelling of 21142214444 in words is "twenty-one billion, one hundred forty-two million, two hundred fourteen thousand, four hundred forty-four".