1141544221 has 4 divisors (see below), whose sum is σ = 1141633600. Its totient is φ = 1141454844.

The previous prime is 1141544153. The next prime is 1141544227. The reversal of 1141544221 is 1224451411.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1224451411 = 73 ⋅16773307.

It is a cyclic number.

It is not a de Polignac number, because 1141544221 - 2⁹ = 1141543709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1141544227) 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, 21531 + ... + 52408.

It is an arithmetic number, because the mean of its divisors is an integer number (285408400).

Almost surely, 2^1141544221 is an apocalyptic number.

It is an amenable number.

1141544221 is a deficient number, since it is larger than the sum of its proper divisors (89379).

1141544221 is an equidigital number, since it uses as much as digits as its factorization.

1141544221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89378.

The product of its digits is 1280, while the sum is 25.

The square root of 1141544221 is about 33786.7462328055. The cubic root of 1141544221 is about 1045.1153985334.

Adding to 1141544221 its reverse (1224451411), we get a palindrome (2365995632).

The spelling of 1141544221 in words is "one billion, one hundred forty-one million, five hundred forty-four thousand, two hundred twenty-one".