221100012112012 has 72 divisors (see below), whose sum is σ = 436549750184016. Its totient is φ = 97873725840000.

The previous prime is 221100012112009. The next prime is 221100012112051. The reversal of 221100012112012 is 210211210001122.

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 23 ways as a sum of consecutive naturals, for example, 34091458 + ... + 40055305.

It is an arithmetic number, because the mean of its divisors is an integer number (6063190974778).

Almost surely, 2^{221100012112012} is an apocalyptic number.

221100012112012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221100012112012 is a deficient number, since it is larger than the sum of its proper divisors (215449738072004).

221100012112012 is a wasteful number, since it uses less digits than its factorization.

221100012112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74146951 (or 74146938 counting only the distinct ones).

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

Adding to 221100012112012 its reverse (210211210001122), we get a palindrome (431311222113134).

The spelling of 221100012112012 in words is "two hundred twenty-one trillion, one hundred billion, twelve million, one hundred twelve thousand, twelve".