1001110221 has 24 divisors (see below), whose sum is σ = 1488143384. Its totient is φ = 648051840.

The previous prime is 1001110207. The next prime is 1001110321. The reversal of 1001110221 is 1220111001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 555309225 + 445800996 = 23565^2 + 21114^2 .

It is not a de Polignac number, because 1001110221 - 2¹⁷ = 1000979149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001110021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177375 + ... + 182931.

Almost surely, 2^1001110221 is an apocalyptic number.

It is an amenable number.

1001110221 is a deficient number, since it is larger than the sum of its proper divisors (487033163).

1001110221 is a wasteful number, since it uses less digits than its factorization.

1001110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141 (or 6138 counting only the distinct ones).

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

The square root of 1001110221 is about 31640.3258674749. The cubic root of 1001110221 is about 1000.3699367966.

Adding to 1001110221 its reverse (1220111001), we get a palindrome (2221221222).

The spelling of 1001110221 in words is "one billion, one million, one hundred ten thousand, two hundred twenty-one".