21010122111112 has 16 divisors (see below), whose sum is σ = 40664752473600. Its totient is φ = 10166188118160.

The previous prime is 21010122111089. The next prime is 21010122111131. The reversal of 21010122111112 is 21111122101012.

It is a super-2 number, since 2×21010122111112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42359116912 + ... + 42359117407.

It is an arithmetic number, because the mean of its divisors is an integer number (2541547029600).

Almost surely, 2^{21010122111112} is an apocalyptic number.

It is an amenable number.

21010122111112 is a deficient number, since it is larger than the sum of its proper divisors (19654630362488).

21010122111112 is a wasteful number, since it uses less digits than its factorization.

21010122111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84718234356 (or 84718234352 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21010122111112 its reverse (21111122101012), we get a palindrome (42121244212124).

It can be divided in two parts, 2101012 and 2111112, that added together give a palindrome (4212124).

The spelling of 21010122111112 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twelve".