21222321231210 has 64 divisors (see below), whose sum is σ = 58832360049024. Its totient is φ = 4842169548800.

The previous prime is 21222321231197. The next prime is 21222321231259. The reversal of 21222321231210 is 1213212322212.

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, 1891466871 + ... + 1891478090.

It is an arithmetic number, because the mean of its divisors is an integer number (919255625766).

Almost surely, 2^{21222321231210} is an apocalyptic number.

21222321231210 is an abundant number, since it is smaller than the sum of its proper divisors (37610038817814).

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

21222321231210 is a wasteful number, since it uses less digits than its factorization.

21222321231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782944999.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21222321231210 its reverse (1213212322212), we get a palindrome (22435533553422).

The spelling of 21222321231210 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred ten".