21102001112212 has 12 divisors (see below), whose sum is σ = 36928536912736. Its totient is φ = 10550990565720.

The previous prime is 21102001112209. The next prime is 21102001112233. The reversal of 21102001112212 is 21221110020112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4326793 + ... + 7805455.

Almost surely, 2^{21102001112212} is an apocalyptic number.

It is an amenable number.

21102001112212 is a deficient number, since it is larger than the sum of its proper divisors (15826535800524).

21102001112212 is a wasteful number, since it uses less digits than its factorization.

21102001112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995198 (or 4995196 counting only the distinct ones).

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

Adding to 21102001112212 its reverse (21221110020112), we get a palindrome (42323111132324).

The spelling of 21102001112212 in words is "twenty-one trillion, one hundred two billion, one million, one hundred twelve thousand, two hundred twelve".