21101010112212 has 48 divisors (see below), whose sum is σ = 50655079551552. Its totient is φ = 6833776308480.

The previous prime is 21101010112211. The next prime is 21101010112253. The reversal of 21101010112212 is 21221101010112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21101010112191 and 21101010112200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101010112211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 179701839 + ... + 179819222.

It is an arithmetic number, because the mean of its divisors is an integer number (1055314157324).

Almost surely, 2^{21101010112212} is an apocalyptic number.

It is an amenable number.

21101010112212 is an abundant number, since it is smaller than the sum of its proper divisors (29554069439340).

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

21101010112212 is a wasteful number, since it uses less digits than its factorization.

21101010112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359521208 (or 359521206 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21101010112212 its reverse (21221101010112), we get a palindrome (42322111122324).

It can be divided in two parts, 21101010112 and 212, that multiplied together give a palindrome (4473414143744).

The spelling of 21101010112212 in words is "twenty-one trillion, one hundred one billion, ten million, one hundred twelve thousand, two hundred twelve".