1121404441 has 4 divisors (see below), whose sum is σ = 1123936272. Its totient is φ = 1118872612.

The previous prime is 1121404397. The next prime is 1121404463. The reversal of 1121404441 is 1444041211.

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 an emirpimes, since its reverse is a distinct semiprime: 1444041211 = 19 ⋅76002169.

It is a cyclic number.

It is not a de Polignac number, because 1121404441 - 2¹³ = 1121396249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121404481) 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, 1265251 + ... + 1266136.

It is an arithmetic number, because the mean of its divisors is an integer number (280984068).

Almost surely, 2^1121404441 is an apocalyptic number.

It is an amenable number.

1121404441 is a deficient number, since it is larger than the sum of its proper divisors (2531831).

1121404441 is an equidigital number, since it uses as much as digits as its factorization.

1121404441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531830.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 1121404441 is about 33487.3773383345. The cubic root of 1121404441 is about 1038.9327195088.

Adding to 1121404441 its reverse (1444041211), we get a palindrome (2565445652).

The spelling of 1121404441 in words is "one billion, one hundred twenty-one million, four hundred four thousand, four hundred forty-one".