1123321013 has 8 divisors (see below), whose sum is σ = 1135631448. Its totient is φ = 1111025664.

The previous prime is 1123320967. The next prime is 1123321049. The reversal of 1123321013 is 3101233211.

It can be written as a sum of positive squares in 4 ways, for example, as 808719844 + 314601169 = 28438^2 + 17737^2 .

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 1123321013 - 2¹⁸ = 1123058869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123320982 and 1123321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123321613) 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, 212045 + ... + 217277.

It is an arithmetic number, because the mean of its divisors is an integer number (141953931).

Almost surely, 2^1123321013 is an apocalyptic number.

It is an amenable number.

1123321013 is a deficient number, since it is larger than the sum of its proper divisors (12310435).

1123321013 is an equidigital number, since it uses as much as digits as its factorization.

1123321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543.

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

The square root of 1123321013 is about 33515.9814566126. The cubic root of 1123321013 is about 1039.5242563337.

Adding to 1123321013 its reverse (3101233211), we get a palindrome (4224554224).

The spelling of 1123321013 in words is "one billion, one hundred twenty-three million, three hundred twenty-one thousand, thirteen".