221112100000012 has 48 divisors (see below), whose sum is σ = 417944158732800. Its totient is φ = 101749859820288.

The previous prime is 221112100000009. The next prime is 221112100000019. The reversal of 221112100000012 is 210000001211122.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 221112099999938 and 221112100000001.

It is not an unprimeable number, because it can be changed into a prime (221112100000019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 196398933 + ... + 197521555.

It is an arithmetic number, because the mean of its divisors is an integer number (8707169973600).

Almost surely, 2^{221112100000012} is an apocalyptic number.

It is an amenable number.

221112100000012 is a deficient number, since it is larger than the sum of its proper divisors (196832058732788).

221112100000012 is a wasteful number, since it uses less digits than its factorization.

221112100000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133842 (or 1133840 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221112100000012 its reverse (210000001211122), we get a palindrome (431112101211134).

The spelling of 221112100000012 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred million, twelve", and thus it is an aban number.