1121444431 has 4 divisors (see below), whose sum is σ = 1131368832. Its totient is φ = 1111520032.

The previous prime is 1121444399. The next prime is 1121444461. The reversal of 1121444431 is 1344441211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121444431 - 2⁵ = 1121444399 is a prime.

It is a super-2 number, since 2×1121444431² = 2515275223641827522, 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 = 1121444396 and 1121444405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121444461) 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, 4962031 + ... + 4962256.

It is an arithmetic number, because the mean of its divisors is an integer number (282842208).

Almost surely, 2^1121444431 is an apocalyptic number.

1121444431 is a deficient number, since it is larger than the sum of its proper divisors (9924401).

1121444431 is an equidigital number, since it uses as much as digits as its factorization.

1121444431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924400.

The product of its digits is 1536, while the sum is 25.

The square root of 1121444431 is about 33487.9744236644. The cubic root of 1121444431 is about 1038.9450690306.

Adding to 1121444431 its reverse (1344441211), we get a palindrome (2465885642).

The spelling of 1121444431 in words is "one billion, one hundred twenty-one million, four hundred forty-four thousand, four hundred thirty-one".