1144121331 has 4 divisors (see below), whose sum is σ = 1525495112. Its totient is φ = 762747552.

The previous prime is 1144121323. The next prime is 1144121353. The reversal of 1144121331 is 1331214411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331214411 = 3 ⋅443738137.

It is not a de Polignac number, because 1144121331 - 2³ = 1144121323 is a prime.

It is a super-2 number, since 2×1144121331² = 2618027240098423122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1144121298 and 1144121307.

It is not an unprimeable number, because it can be changed into a prime (1144121831) 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, 190686886 + ... + 190686891.

It is an arithmetic number, because the mean of its divisors is an integer number (381373778).

Almost surely, 2^1144121331 is an apocalyptic number.

1144121331 is a deficient number, since it is larger than the sum of its proper divisors (381373781).

1144121331 is an equidigital number, since it uses as much as digits as its factorization.

1144121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381373780.

The product of its digits is 288, while the sum is 21.

The square root of 1144121331 is about 33824.8626161290. The cubic root of 1144121331 is about 1045.9012793338.

Adding to 1144121331 its reverse (1331214411), we get a palindrome (2475335742).

The spelling of 1144121331 in words is "one billion, one hundred forty-four million, one hundred twenty-one thousand, three hundred thirty-one".