1011130221 has 4 divisors (see below), whose sum is σ = 1348173632. Its totient is φ = 674086812.

The previous prime is 1011130217. The next prime is 1011130247. The reversal of 1011130221 is 1220311101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1011130221 - 2² = 1011130217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011130197 and 1011130206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011130261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168521701 + ... + 168521706.

It is an arithmetic number, because the mean of its divisors is an integer number (337043408).

Almost surely, 2^1011130221 is an apocalyptic number.

It is an amenable number.

1011130221 is a deficient number, since it is larger than the sum of its proper divisors (337043411).

1011130221 is an equidigital number, since it uses as much as digits as its factorization.

1011130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337043410.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1011130221 is about 31798.2738682464. The cubic root of 1011130221 is about 1003.6963935067.

Adding to 1011130221 its reverse (1220311101), we get a palindrome (2231441322).

The spelling of 1011130221 in words is "one billion, eleven million, one hundred thirty thousand, two hundred twenty-one".