221022112 has 12 divisors (see below), whose sum is σ = 435137346. Its totient is φ = 110511040.

The previous prime is 221022097. The next prime is 221022143. The reversal of 221022112 is 211220122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 173080336 + 47941776 = 13156^2 + 6924^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221022092 and 221022101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3453439 + ... + 3453502.

Almost surely, 2^221022112 is an apocalyptic number.

It is an amenable number.

221022112 is a deficient number, since it is larger than the sum of its proper divisors (214115234).

221022112 is an equidigital number, since it uses as much as digits as its factorization.

221022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906951 (or 6906943 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221022112 is about 14866.8124357577. The cubic root of 221022112 is about 604.6145230170.

Adding to 221022112 its reverse (211220122), we get a palindrome (432242234).

The spelling of 221022112 in words is "two hundred twenty-one million, twenty-two thousand, one hundred twelve".