21122020012112 has 40 divisors (see below), whose sum is σ = 41138499697416. Its totient is φ = 10505650853376.

The previous prime is 21122020012109. The next prime is 21122020012187. The reversal of 21122020012112 is 21121002022112.

21122020012112 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3682008348736 + 17440011663376 = 1918856^2 + 4176124^2 .

It is a super-2 number, since 2×21122020012112² (a number of 27 digits) contains 22 as substring.

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, 18473618 + ... + 19583630.

Almost surely, 2^{21122020012112} is an apocalyptic number.

It is an amenable number.

21122020012112 is a deficient number, since it is larger than the sum of its proper divisors (20016479685304).

21122020012112 is a wasteful number, since it uses less digits than its factorization.

21122020012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116255 (or 1116249 counting only the distinct ones).

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

Adding to 21122020012112 its reverse (21121002022112), we get a palindrome (42243022034224).

The spelling of 21122020012112 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, twelve thousand, one hundred twelve".