1144423121 has 4 divisors (see below), whose sum is σ = 1194180672. Its totient is φ = 1094665572.

The previous prime is 1144423103. The next prime is 1144423129. The reversal of 1144423121 is 1213244411.

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 a cyclic number.

It is not a de Polignac number, because 1144423121 - 2⁶ = 1144423057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 49757527 = 1144423121 / (1 + 1 + 4 + 4 + 4 + 2 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1144423129) 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, 24878741 + ... + 24878786.

It is an arithmetic number, because the mean of its divisors is an integer number (298545168).

Almost surely, 2^1144423121 is an apocalyptic number.

It is an amenable number.

1144423121 is a deficient number, since it is larger than the sum of its proper divisors (49757551).

1144423121 is an equidigital number, since it uses as much as digits as its factorization.

1144423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49757550.

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

The square root of 1144423121 is about 33829.3233896275. The cubic root of 1144423121 is about 1045.9932319353.

Adding to 1144423121 its reverse (1213244411), we get a palindrome (2357667532).

The spelling of 1144423121 in words is "one billion, one hundred forty-four million, four hundred twenty-three thousand, one hundred twenty-one".