21022212010112 has 64 divisors (see below), whose sum is σ = 42266799504600. Its totient is φ = 10414085013504.

The previous prime is 21022212010097. The next prime is 21022212010133. The reversal of 21022212010112 is 21101021222012.

It can be written as a sum of positive squares in 4 ways, for example, as 16672718234176 + 4349493775936 = 4083224^2 + 2085544^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 349565198 + ... + 349625330.

Almost surely, 2^{21022212010112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022212010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21133399752300).

21022212010112 is an abundant number, since it is smaller than the sum of its proper divisors (21244587494488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022212010112 is a wasteful number, since it uses less digits than its factorization.

21022212010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85313 (or 85301 counting only the distinct ones).

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

Adding to 21022212010112 its reverse (21101021222012), we get a palindrome (42123233232124).

The spelling of 21022212010112 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, ten thousand, one hundred twelve".