21001144010 has 64 divisors (see below), whose sum is σ = 47212519680. Its totient is φ = 6534328320.

The previous prime is 21001143959. The next prime is 21001144051. The reversal of 21001144010 is 1044110012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 420656 + ... + 467924.

It is an arithmetic number, because the mean of its divisors is an integer number (737695620).

Almost surely, 2^21001144010 is an apocalyptic number.

21001144010 is an abundant number, since it is smaller than the sum of its proper divisors (26211375670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001144010 is a wasteful number, since it uses less digits than its factorization.

21001144010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47871.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001144010 its reverse (1044110012), we get a palindrome (22045254022).

The spelling of 21001144010 in words is "twenty-one billion, one million, one hundred forty-four thousand, ten".