1121303231 has 4 divisors (see below), whose sum is σ = 1121397912. Its totient is φ = 1121208552.

The previous prime is 1121303203. The next prime is 1121303233. The reversal of 1121303231 is 1323031211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121303231 - 2¹⁴ = 1121286847 is a prime.

It is a super-2 number, since 2×1121303231² = 2514641871702078722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121303233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26525 + ... + 54278.

It is an arithmetic number, because the mean of its divisors is an integer number (280349478).

Almost surely, 2^1121303231 is an apocalyptic number.

1121303231 is a deficient number, since it is larger than the sum of its proper divisors (94681).

1121303231 is an equidigital number, since it uses as much as digits as its factorization.

1121303231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94680.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1121303231 is about 33485.8661378200. The cubic root of 1121303231 is about 1038.9014630058.

Adding to 1121303231 its reverse (1323031211), we get a palindrome (2444334442).

The spelling of 1121303231 in words is "one billion, one hundred twenty-one million, three hundred three thousand, two hundred thirty-one".