221211112 has 16 divisors (see below), whose sum is σ = 415971360. Its totient is φ = 110285424.

The previous prime is 221211083. The next prime is 221211127. The reversal of 221211112 is 211112122.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221211092 and 221211101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37068 + ... + 42619.

It is an arithmetic number, because the mean of its divisors is an integer number (25998210).

Almost surely, 2^221211112 is an apocalyptic number.

It is an amenable number.

221211112 is a deficient number, since it is larger than the sum of its proper divisors (194760248).

221211112 is a wasteful number, since it uses less digits than its factorization.

221211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80040 (or 80036 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 221211112 is about 14873.1675173784. The cubic root of 221211112 is about 604.7868128499.

Adding to 221211112 its reverse (211112122), we get a palindrome (432323234).

The spelling of 221211112 in words is "two hundred twenty-one million, two hundred eleven thousand, one hundred twelve".