21101102001212 has 48 divisors (see below), whose sum is σ = 38633773953600. Its totient is φ = 10084384724480.

The previous prime is 21101102001211. The next prime is 21101102001253. The reversal of 21101102001212 is 21210020110112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101102001211) 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, 66077864 + ... + 66396432.

It is an arithmetic number, because the mean of its divisors is an integer number (804870290700).

Almost surely, 2^{21101102001212} is an apocalyptic number.

It is an amenable number.

21101102001212 is a deficient number, since it is larger than the sum of its proper divisors (17532671952388).

21101102001212 is a wasteful number, since it uses less digits than its factorization.

21101102001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320003 (or 319955 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101102001212 its reverse (21210020110112), we get a palindrome (42311122111324).

The spelling of 21101102001212 in words is "twenty-one trillion, one hundred one billion, one hundred two million, one thousand, two hundred twelve".