221020112 has 10 divisors (see below), whose sum is σ = 428226498. Its totient is φ = 110510048.

The previous prime is 221020099. The next prime is 221020127. The reversal of 221020112 is 211020122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 158357056 + 62663056 = 12584^2 + 7916^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221020093 and 221020102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6906863 + ... + 6906894.

Almost surely, 2^221020112 is an apocalyptic number.

It is an amenable number.

221020112 is a deficient number, since it is larger than the sum of its proper divisors (207206386).

221020112 is a wasteful number, since it uses less digits than its factorization.

221020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13813765 (or 13813759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221020112 is about 14866.7451716911. The cubic root of 221020112 is about 604.6126993191.

Adding to 221020112 its reverse (211020122), we get a palindrome (432040234).

It can be divided in two parts, 2210 and 20112, that added together give a palindrome (22322).

The spelling of 221020112 in words is "two hundred twenty-one million, twenty thousand, one hundred twelve".