110011221 has 6 divisors (see below), whose sum is σ = 158905110. Its totient is φ = 73340808.

The previous prime is 110011217. The next prime is 110011283. The reversal of 110011221 is 122110011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 52403121 = 7590^2 + 7239^2 .

It is not a de Polignac number, because 110011221 - 2² = 110011217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 12223469 = 110011221 / (1 + 1 + 0 + 0 + 1 + 1 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110011621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6111726 + ... + 6111743.

It is an arithmetic number, because the mean of its divisors is an integer number (26484185).

Almost surely, 2^110011221 is an apocalyptic number.

It is an amenable number.

110011221 is a deficient number, since it is larger than the sum of its proper divisors (48893889).

110011221 is a wasteful number, since it uses less digits than its factorization.

110011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223475 (or 12223472 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 110011221 is about 10488.6234082457. The cubic root of 110011221 is about 479.1582774318.

Adding to 110011221 its reverse (122110011), we get a palindrome (232121232).

It can be divided in two parts, 1100 and 11221, that added together give a palindrome (12321).

The spelling of 110011221 in words is "one hundred ten million, eleven thousand, two hundred twenty-one".