21222102022210 has 64 divisors (see below), whose sum is σ = 38953921960800. Its totient is φ = 8322913492992.

The previous prime is 21222102022207. The next prime is 21222102022337. The reversal of 21222102022210 is 1222020122212.

It can be written as a sum of positive squares in 16 ways, for example, as 1025445845449 + 20196656176761 = 1012643^2 + 4494069^2 .

It is a super-2 number, since 2×21222102022210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891186264 + ... + 891210076.

Almost surely, 2^{21222102022210} is an apocalyptic number.

21222102022210 is a deficient number, since it is larger than the sum of its proper divisors (17731819938590).

21222102022210 is a wasteful number, since it uses less digits than its factorization.

21222102022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32455.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222102022210 its reverse (1222020122212), we get a palindrome (22444122144422).

The spelling of 21222102022210 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, twenty-two thousand, two hundred ten".