221020112102012 has 12 divisors (see below), whose sum is σ = 386789001471936. Its totient is φ = 110508968824320.

The previous prime is 221020112101967. The next prime is 221020112102017. The reversal of 221020112102012 is 210201211020122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020112102017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271349189 + ... + 272162492.

It is an arithmetic number, because the mean of its divisors is an integer number (32232416789328).

Almost surely, 2^{221020112102012} is an apocalyptic number.

It is an amenable number.

221020112102012 is a deficient number, since it is larger than the sum of its proper divisors (165768889369924).

221020112102012 is a wasteful number, since it uses less digits than its factorization.

221020112102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543613348 (or 543613346 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020112102012 its reverse (210201211020122), we get a palindrome (431221323122134).

The spelling of 221020112102012 in words is "two hundred twenty-one trillion, twenty billion, one hundred twelve million, one hundred two thousand, twelve".