1001313123 has 4 divisors (see below), whose sum is σ = 1335084168. Its totient is φ = 667542080.

The previous prime is 1001313097. The next prime is 1001313133. The reversal of 1001313123 is 3213131001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3213131001 = 3 ⋅1071043667.

It is a cyclic number.

It is not a de Polignac number, because 1001313123 - 2⁶ = 1001313059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001313133) 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, 166885518 + ... + 166885523.

It is an arithmetic number, because the mean of its divisors is an integer number (333771042).

Almost surely, 2^1001313123 is an apocalyptic number.

1001313123 is a deficient number, since it is larger than the sum of its proper divisors (333771045).

1001313123 is an equidigital number, since it uses as much as digits as its factorization.

1001313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333771044.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1001313123 is about 31643.5320879323. The cubic root of 1001313123 is about 1000.4375162183.

Adding to 1001313123 its reverse (3213131001), we get a palindrome (4214444124).

The spelling of 1001313123 in words is "one billion, one million, three hundred thirteen thousand, one hundred twenty-three".