221211201112 has 32 divisors (see below), whose sum is σ = 456957450000. Its totient is φ = 99554992000.

The previous prime is 221211201077. The next prime is 221211201131. The reversal of 221211201112 is 211102112122.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12435487 + ... + 12453262.

Almost surely, 2^221211201112 is an apocalyptic number.

221211201112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221211201112 is an abundant number, since it is smaller than the sum of its proper divisors (235746248888).

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

221211201112 is a wasteful number, since it uses less digits than its factorization.

221211201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888867 (or 24888863 counting only the distinct ones).

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

Adding to 221211201112 its reverse (211102112122), we get a palindrome (432313313234).

The spelling of 221211201112 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred one thousand, one hundred twelve".