221012112012 has 12 divisors (see below), whose sum is σ = 515694928056. Its totient is φ = 73670704000.

The previous prime is 221012111989. The next prime is 221012112091. The reversal of 221012112012 is 210211210122.

221012112012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 221012111982 and 221012112000.

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 in 3 ways as a sum of consecutive naturals, for example, 9208837989 + ... + 9208838012.

It is an arithmetic number, because the mean of its divisors is an integer number (42974577338).

Almost surely, 2^221012112012 is an apocalyptic number.

It is an amenable number.

221012112012 is an abundant number, since it is smaller than the sum of its proper divisors (294682816044).

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

221012112012 is a wasteful number, since it uses less digits than its factorization.

221012112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18417676008 (or 18417676006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221012112012 its reverse (210211210122), we get a palindrome (431223322134).

The spelling of 221012112012 in words is "two hundred twenty-one billion, twelve million, one hundred twelve thousand, twelve".