21001443110 has 32 divisors (see below), whose sum is σ = 38341512000. Its totient is φ = 8281595520.

The previous prime is 21001443107. The next prime is 21001443121. The reversal of 21001443110 is 1134410012.

It is a happy number.

It is a super-2 number, since 2×21001443110² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 168500 + ... + 265320.

It is an arithmetic number, because the mean of its divisors is an integer number (1198172250).

Almost surely, 2^21001443110 is an apocalyptic number.

21001443110 is a deficient number, since it is larger than the sum of its proper divisors (17340068890).

21001443110 is a wasteful number, since it uses less digits than its factorization.

21001443110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97136.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21001443110 its reverse (1134410012), we get a palindrome (22135853122).

The spelling of 21001443110 in words is "twenty-one billion, one million, four hundred forty-three thousand, one hundred ten".