11142044321 has 4 divisors (see below), whose sum is σ = 11443180692. Its totient is φ = 10840907952.

The previous prime is 11142044317. The next prime is 11142044357. The reversal of 11142044321 is 12344024111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12344024111 = 61 ⋅202361051.

It can be written as a sum of positive squares in 2 ways, for example, as 7489171600 + 3652872721 = 86540^2 + 60439^2 .

It is a cyclic number.

It is not a de Polignac number, because 11142044321 - 2² = 11142044317 is a prime.

It is a super-2 number, since 2×11142044321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11142044821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150568130 + ... + 150568203.

It is an arithmetic number, because the mean of its divisors is an integer number (2860795173).

Almost surely, 2^11142044321 is an apocalyptic number.

It is an amenable number.

11142044321 is a deficient number, since it is larger than the sum of its proper divisors (301136371).

11142044321 is an equidigital number, since it uses as much as digits as its factorization.

11142044321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301136370.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 11142044321 its reverse (12344024111), we get a palindrome (23486068432).

The spelling of 11142044321 in words is "eleven billion, one hundred forty-two million, forty-four thousand, three hundred twenty-one".