21222012010112 has 16 divisors (see below), whose sum is σ = 42278227051650. Its totient is φ = 10611006004992.

The previous prime is 21222012010063. The next prime is 21222012010123. The reversal of 21222012010112 is 21101021022212.

It can be written as a sum of positive squares in only one way, i.e., 11433974165056 + 9788037845056 = 3381416^2 + 3128584^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82898484287 + ... + 82898484542.

Almost surely, 2^{21222012010112} is an apocalyptic number.

It is an amenable number.

21222012010112 is a deficient number, since it is larger than the sum of its proper divisors (21056215041538).

21222012010112 is an equidigital number, since it uses as much as digits as its factorization.

21222012010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165796968843 (or 165796968831 counting only the distinct ones).

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

Adding to 21222012010112 its reverse (21101021022212), we get a palindrome (42323033032324).

The spelling of 21222012010112 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, ten thousand, one hundred twelve".