21222000122210 has 16 divisors (see below), whose sum is σ = 38199891945600. Its totient is φ = 8488735220976.

The previous prime is 21222000122203. The next prime is 21222000122299. The reversal of 21222000122210 is 1222100022212.

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, 6717290 + ... + 9357669.

It is an arithmetic number, because the mean of its divisors is an integer number (2387493246600).

Almost surely, 2^{21222000122210} is an apocalyptic number.

21222000122210 is a deficient number, since it is larger than the sum of its proper divisors (16977891823390).

21222000122210 is a wasteful number, since it uses less digits than its factorization.

21222000122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16206985.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222000122210 its reverse (1222100022212), we get a palindrome (22444100144422).

The spelling of 21222000122210 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two thousand, two hundred ten".