221101110012012 has 24 divisors (see below), whose sum is σ = 543055357924800. Its totient is φ = 69821403161616.

The previous prime is 221101110012001. The next prime is 221101110012023. The reversal of 221101110012012 is 210210011101122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221101110012001) and next prime (221101110012023).

It is a junction number, because it is equal to n+sod(n) for n = 221101110011982 and 221101110012000.

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 in 7 ways as a sum of consecutive naturals, for example, 484870855062 + ... + 484870855517.

It is an arithmetic number, because the mean of its divisors is an integer number (22627306580200).

Almost surely, 2^{221101110012012} is an apocalyptic number.

It is an amenable number.

221101110012012 is an abundant number, since it is smaller than the sum of its proper divisors (321954247912788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221101110012012 is a wasteful number, since it uses less digits than its factorization.

221101110012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969741710605 (or 969741710603 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221101110012012 its reverse (210210011101122), we get a palindrome (431311121113134).

The spelling of 221101110012012 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred ten million, twelve thousand, twelve".