21013043344210 has 16 divisors (see below), whose sum is σ = 37823840232192. Its totient is φ = 8405136846000.

The previous prime is 21013043344193. The next prime is 21013043344291. The reversal of 21013043344210 is 1244334031012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8959266 + ... + 11058685.

It is an arithmetic number, because the mean of its divisors is an integer number (2363990014512).

Almost surely, 2^{21013043344210} is an apocalyptic number.

21013043344210 is a deficient number, since it is larger than the sum of its proper divisors (16810796887982).

21013043344210 is a wasteful number, since it uses less digits than its factorization.

21013043344210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122929.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21013043344210 its reverse (1244334031012), we get a palindrome (22257377375222).

The spelling of 21013043344210 in words is "twenty-one trillion, thirteen billion, forty-three million, three hundred forty-four thousand, two hundred ten".