22021605203210 has 16 divisors (see below), whose sum is σ = 39763933186536. Its totient is φ = 8780854565568.

The previous prime is 22021605203177. The next prime is 22021605203291. The reversal of 22021605203210 is 1230250612022.

It can be written as a sum of positive squares in 4 ways, for example, as 19293713636521 + 2727891566689 = 4392461^2 + 1651633^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22021605203210.

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, 3473436137 + ... + 3473442476.

Almost surely, 2^{22021605203210} is an apocalyptic number.

22021605203210 is a deficient number, since it is larger than the sum of its proper divisors (17742327983326).

22021605203210 is a wasteful number, since it uses less digits than its factorization.

22021605203210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946878937.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 22021605203210 its reverse (1230250612022), we get a palindrome (23251855815232).

The spelling of 22021605203210 in words is "twenty-two trillion, twenty-one billion, six hundred five million, two hundred three thousand, two hundred ten".