21110012111212 has 6 divisors (see below), whose sum is σ = 36942521194628. Its totient is φ = 10555006055604.

The previous prime is 21110012111191. The next prime is 21110012111261. The reversal of 21110012111212 is 21211121001112.

It is a super-2 number, since 2×21110012111212² (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 as a sum of consecutive naturals, namely, 2638751513898 + ... + 2638751513905.

Almost surely, 2^{21110012111212} is an apocalyptic number.

It is an amenable number.

21110012111212 is a deficient number, since it is larger than the sum of its proper divisors (15832509083416).

21110012111212 is a wasteful number, since it uses less digits than its factorization.

21110012111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277503027807 (or 5277503027805 counting only the distinct ones).

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

Adding to 21110012111212 its reverse (21211121001112), we get a palindrome (42321133112324).

The spelling of 21110012111212 in words is "twenty-one trillion, one hundred ten billion, twelve million, one hundred eleven thousand, two hundred twelve".