221001111020012 has 24 divisors (see below), whose sum is σ = 387862233612000. Its totient is φ = 110183333446656.

The previous prime is 221001111020009. The next prime is 221001111020077. The reversal of 221001111020012 is 210020111100122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367530233 + ... + 368131055.

It is an arithmetic number, because the mean of its divisors is an integer number (16160926400500).

Almost surely, 2^{221001111020012} is an apocalyptic number.

It is an amenable number.

221001111020012 is a deficient number, since it is larger than the sum of its proper divisors (166861122591988).

221001111020012 is a wasteful number, since it uses less digits than its factorization.

221001111020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864665 (or 864663 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221001111020012 its reverse (210020111100122), we get a palindrome (431021222120134).

The spelling of 221001111020012 in words is "two hundred twenty-one trillion, one billion, one hundred eleven million, twenty thousand, twelve".