21043311213210 has 64 divisors (see below), whose sum is σ = 59333308272000. Its totient is φ = 4708992718080.

The previous prime is 21043311213193. The next prime is 21043311213289. The reversal of 21043311213210 is 1231211334012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2452596085 + ... + 2452604664.

It is an arithmetic number, because the mean of its divisors is an integer number (927082941750).

Almost surely, 2^{21043311213210} is an apocalyptic number.

21043311213210 is an abundant number, since it is smaller than the sum of its proper divisors (38289997058790).

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

21043311213210 is a wasteful number, since it uses less digits than its factorization.

21043311213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905200783.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21043311213210 its reverse (1231211334012), we get a palindrome (22274522547222).

The spelling of 21043311213210 in words is "twenty-one trillion, forty-three billion, three hundred eleven million, two hundred thirteen thousand, two hundred ten".