1100442221 has 8 divisors (see below), whose sum is σ = 1105371960. Its totient is φ = 1095524352.

The previous prime is 1100442169. The next prime is 1100442263. The reversal of 1100442221 is 1222440011.

It can be written as a sum of positive squares in 4 ways, for example, as 74200996 + 1026241225 = 8614^2 + 32035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1100442221 - 2⁶ = 1100442157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100442221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100442121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217901 + ... + 222893.

It is an arithmetic number, because the mean of its divisors is an integer number (138171495).

Almost surely, 2^1100442221 is an apocalyptic number.

It is an amenable number.

1100442221 is a deficient number, since it is larger than the sum of its proper divisors (4929739).

1100442221 is an equidigital number, since it uses as much as digits as its factorization.

1100442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1100442221 is about 33172.9139660657. The cubic root of 1100442221 is about 1032.4184290277.

Adding to 1100442221 its reverse (1222440011), we get a palindrome (2322882232).

The spelling of 1100442221 in words is "one billion, one hundred million, four hundred forty-two thousand, two hundred twenty-one".