110001221 has 12 divisors (see below), whose sum is σ = 122121132. Its totient is φ = 99000000.

The previous prime is 110001211. The next prime is 110001247. The reversal of 110001221 is 122100011.

It can be written as a sum of positive squares in 2 ways, for example, as 67881121 + 42120100 = 8239^2 + 6490^2 .

It is not a de Polignac number, because 110001221 - 2¹⁰ = 110000197 is a prime.

It is a Duffinian number.

110001221 is a modest number, since divided by 1221 gives 110 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 110001199 and 110001208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7721 + ... + 16721.

It is an arithmetic number, because the mean of its divisors is an integer number (10176761).

Almost surely, 2^110001221 is an apocalyptic number.

110001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110001221 is a deficient number, since it is larger than the sum of its proper divisors (12119911).

110001221 is a wasteful number, since it uses less digits than its factorization.

110001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124 (or 9113 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 110001221 is about 10488.1466904311. The cubic root of 110001221 is about 479.1437585251.

Adding to 110001221 its reverse (122100011), we get a palindrome (232101232).

It can be divided in two parts, 11000 and 1221, that added together give a palindrome (12221).

The spelling of 110001221 in words is "one hundred ten million, one thousand, two hundred twenty-one".