21222010101212 has 12 divisors (see below), whose sum is σ = 37138573153416. Its totient is φ = 10610989200240.

The previous prime is 21222010101209. The next prime is 21222010101223. The reversal of 21222010101212 is 21210101022212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640643 + ... + 6546330.

It is an arithmetic number, because the mean of its divisors is an integer number (3094881096118).

Almost surely, 2^{21222010101212} is an apocalyptic number.

It is an amenable number.

21222010101212 is a deficient number, since it is larger than the sum of its proper divisors (15916563052204).

21222010101212 is a wasteful number, since it uses less digits than its factorization.

21222010101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925188 (or 7925186 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222010101212 its reverse (21210101022212), we get a palindrome (42432111123424).

The spelling of 21222010101212 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred one thousand, two hundred twelve".