21010122101212 has 12 divisors (see below), whose sum is σ = 36954351819000. Its totient is φ = 10451735867216.

The previous prime is 21010122101201. The next prime is 21010122101231. The reversal of 21010122101212 is 21210122101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13331294962 + ... + 13331296537.

It is an arithmetic number, because the mean of its divisors is an integer number (3079529318250).

Almost surely, 2^{21010122101212} is an apocalyptic number.

It is an amenable number.

21010122101212 is a deficient number, since it is larger than the sum of its proper divisors (15944229717788).

21010122101212 is a wasteful number, since it uses less digits than its factorization.

21010122101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26662591700 (or 26662591698 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21010122101212 its reverse (21210122101012), we get a palindrome (42220244202224).

The spelling of 21010122101212 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, one hundred one thousand, two hundred twelve".