1123151311 has 4 divisors (see below), whose sum is σ = 1123218432. Its totient is φ = 1123084192.

The previous prime is 1123151279. The next prime is 1123151347. The reversal of 1123151311 is 1131513211.

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 1123151311 - 2⁵ = 1123151279 is a prime.

It is a super-2 number, since 2×1123151311² = 2522937734802037442, 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 (1123151371) 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, 14130 + ... + 49456.

It is an arithmetic number, because the mean of its divisors is an integer number (280804608).

Almost surely, 2^1123151311 is an apocalyptic number.

1123151311 is a deficient number, since it is larger than the sum of its proper divisors (67121).

1123151311 is an equidigital number, since it uses as much as digits as its factorization.

1123151311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67120.

The product of its digits is 90, while the sum is 19.

The square root of 1123151311 is about 33513.4497030670. The cubic root of 1123151311 is about 1039.4719061366.

Adding to 1123151311 its reverse (1131513211), we get a palindrome (2254664522).

The spelling of 1123151311 in words is "one billion, one hundred twenty-three million, one hundred fifty-one thousand, three hundred eleven".