21222210000212 has 12 divisors (see below), whose sum is σ = 39995703462036. Its totient is φ = 9794866153920.

The previous prime is 21222210000209. The next prime is 21222210000247. The reversal of 21222210000212 is 21200001222212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3129488369296 + 18092721630916 = 1769036^2 + 4253554^2 .

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, 204059711489 + ... + 204059711592.

It is an arithmetic number, because the mean of its divisors is an integer number (3332975288503).

Almost surely, 2^{21222210000212} is an apocalyptic number.

It is an amenable number.

21222210000212 is a deficient number, since it is larger than the sum of its proper divisors (18773493461824).

21222210000212 is a wasteful number, since it uses less digits than its factorization.

21222210000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408119423098 (or 408119423096 counting only the distinct ones).

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

Adding to 21222210000212 its reverse (21200001222212), we get a palindrome (42422211222424).

The spelling of 21222210000212 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, two hundred twelve", and thus it is an aban number.