21021144010 has 8 divisors (see below), whose sum is σ = 37838059236. Its totient is φ = 8408457600.

The previous prime is 21021144007. The next prime is 21021144047. The reversal of 21021144010 is 1044112012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19822668849 + 1198475161 = 140793^2 + 34619^2 .

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

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, 1051057191 + ... + 1051057210.

Almost surely, 2^21021144010 is an apocalyptic number.

21021144010 is a deficient number, since it is larger than the sum of its proper divisors (16816915226).

21021144010 is a wasteful number, since it uses less digits than its factorization.

21021144010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102114408.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21021144010 its reverse (1044112012), we get a palindrome (22065256022).

The spelling of 21021144010 in words is "twenty-one billion, twenty-one million, one hundred forty-four thousand, ten".