21222211200212 has 24 divisors (see below), whose sum is σ = 40718724110400. Its totient is φ = 9597984960960.

The previous prime is 21222211200181. The next prime is 21222211200277. The reversal of 21222211200212 is 21200211222212.

It is a congruent 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, 1211858033 + ... + 1211875544.

It is an arithmetic number, because the mean of its divisors is an integer number (1696613504600).

Almost surely, 2^{21222211200212} is an apocalyptic number.

21222211200212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222211200212 is a deficient number, since it is larger than the sum of its proper divisors (19496512910188).

21222211200212 is a wasteful number, since it uses less digits than its factorization.

21222211200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423733791 (or 2423733789 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222211200212 its reverse (21200211222212), we get a palindrome (42422422422424).

The spelling of 21222211200212 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred thousand, two hundred twelve".