1130440021 has 8 divisors (see below), whose sum is σ = 1182900024. Its totient is φ = 1079133120.

The previous prime is 1130439991. The next prime is 1130440027. The reversal of 1130440021 is 1200440311.

It can be written as a sum of positive squares in 4 ways, for example, as 542377521 + 588062500 = 23289^2 + 24250^2 .

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

It is not a de Polignac number, because 1130440021 - 2⁹ = 1130439509 is a prime.

It is a super-3 number, since 3×1130440021³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1130439977 and 1130440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130440027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286270 + ... + 290191.

It is an arithmetic number, because the mean of its divisors is an integer number (147862503).

Almost surely, 2^1130440021 is an apocalyptic number.

It is an amenable number.

1130440021 is a deficient number, since it is larger than the sum of its proper divisors (52460003).

1130440021 is an equidigital number, since it uses as much as digits as its factorization.

1130440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576551.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1130440021 is about 33622.0169085675. The cubic root of 1130440021 is about 1041.7156165954.

Adding to 1130440021 its reverse (1200440311), we get a palindrome (2330880332).

The spelling of 1130440021 in words is "one billion, one hundred thirty million, four hundred forty thousand, twenty-one".