221211222120112 has 80 divisors (see below), whose sum is σ = 489984709384192. Its totient is φ = 94773873692160.

The previous prime is 221211222120067. The next prime is 221211222120127. The reversal of 221211222120112 is 211021222112122.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6449853748 + ... + 6449888044.

Almost surely, 2^{221211222120112} is an apocalyptic number.

It is an amenable number.

221211222120112 is an abundant number, since it is smaller than the sum of its proper divisors (268773487264080).

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

221211222120112 is a wasteful number, since it uses less digits than its factorization.

221211222120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51426 (or 51420 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221211222120112 its reverse (211021222112122), we get a palindrome (432232444232234).

The spelling of 221211222120112 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twelve".