21211200112012 has 6 divisors (see below), whose sum is σ = 37119600196028. Its totient is φ = 10605600056004.

The previous prime is 21211200112007. The next prime is 21211200112027. The reversal of 21211200112012 is 21021100211212.

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 as a sum of consecutive naturals, namely, 2651400013998 + ... + 2651400014005.

Almost surely, 2^{21211200112012} is an apocalyptic number.

It is an amenable number.

21211200112012 is a deficient number, since it is larger than the sum of its proper divisors (15908400084016).

21211200112012 is a wasteful number, since it uses less digits than its factorization.

21211200112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5302800028007 (or 5302800028005 counting only the distinct ones).

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

Adding to 21211200112012 its reverse (21021100211212), we get a palindrome (42232300323224).

The spelling of 21211200112012 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, one hundred twelve thousand, twelve".