1123021313 has 8 divisors (see below), whose sum is σ = 1138717800. Its totient is φ = 1107393408.

The previous prime is 1123021303. The next prime is 1123021321. The reversal of 1123021313 is 3131203211.

It can be written as a sum of positive squares in 4 ways, for example, as 143832049 + 979189264 = 11993^2 + 31292^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123021313 - 2⁴ = 1123021297 is a prime.

It is a super-2 number, since 2×1123021313² = 2522353738904487938, 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 = 1123021291 and 1123021300.

It is not an unprimeable number, because it can be changed into a prime (1123021303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16283 + ... + 50111.

It is an arithmetic number, because the mean of its divisors is an integer number (142339725).

Almost surely, 2^1123021313 is an apocalyptic number.

It is an amenable number.

1123021313 is a deficient number, since it is larger than the sum of its proper divisors (15696487).

1123021313 is an equidigital number, since it uses as much as digits as its factorization.

1123021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34291.

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

The square root of 1123021313 is about 33511.5101569595. The cubic root of 1123021313 is about 1039.4318003849.

Adding to 1123021313 its reverse (3131203211), we get a palindrome (4254224524).

The spelling of 1123021313 in words is "one billion, one hundred twenty-three million, twenty-one thousand, three hundred thirteen".